diff --git a/app/imports/api/creature/creatures/methods/restCreature.js b/app/imports/api/creature/creatures/methods/restCreature.js
index 0115db52..2f630a5b 100644
--- a/app/imports/api/creature/creatures/methods/restCreature.js
+++ b/app/imports/api/creature/creatures/methods/restCreature.js
@@ -1,9 +1,14 @@
 import SimpleSchema from 'simpl-schema';
 import { ValidatedMethod } from 'meteor/mdg:validated-method';
 import { RateLimiterMixin } from 'ddp-rate-limiter-mixin';
-import Creatures from '/imports/api/creature/creatures/Creatures.js';
 import CreatureProperties from '/imports/api/creature/creatureProperties/CreatureProperties.js';
 import { assertEditPermission } from '/imports/api/creature/creatures/creaturePermissions.js';
+import { groupBy, remove, rest, union } from 'lodash';
+import {
+  getCreature, getVariables, getPropertiesOfType
+} from '/imports/api/engine/loadCreatures.js';
+import { CreatureLogSchema, insertCreatureLogWork } from '/imports/api/creature/log/CreatureLogs.js';
+import { applyTrigger } from '/imports/api/engine/actions/applyTriggers.js';
 
 const restCreature = new ValidatedMethod({
   name: 'creature.methods.rest',
@@ -23,101 +28,142 @@ const restCreature = new ValidatedMethod({
     timeInterval: 5000,
   },
   run({creatureId, restType}) {
-    let creature = Creatures.findOne(creatureId, {
-      fields: {
-        owner: 1,
-        writers: 1,
-        settings: 1,
-      }
-    }) ;
-    // Need edit permissions
+    // Check permissions
+    let creature = getCreature(creatureId);
     assertEditPermission(creature, this.userId);
 
-    // Long rests reset short rest properties as well
-    let resetFilter;
-    if (restType === 'shortRest'){
-      resetFilter = 'shortRest'
-    } else {
-      resetFilter = {$in: ['shortRest', 'longRest']}
+    // Add the variables to the creature document
+    const variables = getVariables(creatureId);
+    delete variables._id;
+    delete variables._creatureId;
+    creature.variables = variables;
+    const scope = creature.variables;
+
+    // Get the triggers
+    let triggers = getPropertiesOfType(creatureId, 'trigger');
+    remove(triggers, trigger =>
+      trigger.event !== 'anyRest' &&
+      trigger.event !== 'longRest' &&
+      trigger.event !== 'shortRest'
+    );
+    triggers = groupBy(triggers, 'event');
+    for (let type in triggers) {
+      triggers[type] = groupBy(triggers[type], 'timing')
     }
-    // Only apply to active properties
-    let filter = {
-      'ancestors.id': creatureId,
-      reset: resetFilter,
-      removed: { $ne: true },
-      inactive: { $ne: true },
-    };
-    // update all attribute's damage
-    filter.type = 'attribute';
-    CreatureProperties.update(filter, {
-      $set: {
-        damage: 0,
-        dirty: true,
-      }
-    }, {
-      selector: {type: 'attribute'},
-      multi: true,
+
+    // Create the log
+    const log = CreatureLogSchema.clean({
+      creatureId: creature._id,
+      creatureName: creature.name,
     });
-    // Update all action-like properties' usesUsed
-    filter.type = {$in: [
-      'action',
-      'attack',
-      'spell'
-    ]};
-    CreatureProperties.update(filter, {
-      $set: {
-        usesUsed: 0,
-        dirty: true,
-      }
-    }, {
-      selector: {type: 'action'},
-      multi: true,
-    });
-    // Reset half hit dice on a long rest, starting with the highest dice
-    if (restType === 'longRest'){
-      let hitDice = CreatureProperties.find({
-        'ancestors.id': creatureId,
-        type: 'attribute',
-        attributeType: 'hitDice',
-        removed: {$ne: true},
-        inactive: {$ne: true},
-      }, {
-        fields: {
-          hitDiceSize: 1,
-          damage: 1,
-          value: 1,
-        }
-      }).fetch();
-      // Use a collator to do sorting in natural order
-      let collator = new Intl.Collator('en', {
-        numeric: true, sensitivity: 'base'
-      });
-      // Get the hit dice in decending order of hitDiceSize
-      let compare = (a, b) => collator.compare(b.hitDiceSize, a.hitDiceSize)
-      hitDice.sort(compare);
-      // Get the total number of hit dice that can be recovered this rest
-      let totalHd = hitDice.reduce((sum, hd) => sum + (hd.value || 0), 0);
-      let resetMultiplier = creature.settings.hitDiceResetMultiplier || 0.5;
-      let recoverableHd = Math.max(Math.floor(totalHd*resetMultiplier), 1);
-      // recover each hit dice in turn until the recoverable amount is used up
-      let amountToRecover, resultingDamage;
-      hitDice.forEach(hd => {
-        if (!recoverableHd) return;
-        amountToRecover = Math.min(recoverableHd, hd.damage || 0);
-        if (!amountToRecover) return;
-        recoverableHd -= amountToRecover;
-        resultingDamage = hd.damage - amountToRecover;
-        CreatureProperties.update(hd._id, {
-          $set: {
-            damage: resultingDamage,
-            dirty: true,
-          }
-        }, {
-          selector: {type: 'attribute'},
-        });
-      });
-    }
+
+    const targets = [creature];
+
+    applyTriggers(triggers, restType, 'before', { creature, targets, scope, log });
+    doRestWork(creature, restType);
+    applyTriggers(triggers, restType, 'after', { creature, targets, scope, log });
+
+    insertCreatureLogWork({log, creature, method: this});
   },
 });
 
+function applyTriggers(triggers, restType, timing, opts) {
+  // Get matching triggers
+  let selectedTriggers = triggers[restType]?.[timing] || [];
+  // Get any rest triggers as well
+  selectedTriggers = union(selectedTriggers, triggers['anyRest']?.[timing]);
+  selectedTriggers.sort((a, b) => a.order - b.order);
+  // Apply the triggers
+  selectedTriggers.forEach(trigger => {
+    applyTrigger(trigger, opts)
+  });
+}
+
+function doRestWork(creature, restType) {
+  // Long rests reset short rest properties as well
+  let resetFilter;
+  if (restType === 'shortRest'){
+    resetFilter = 'shortRest'
+  } else {
+    resetFilter = {$in: ['shortRest', 'longRest']}
+  }
+  // Only apply to active properties
+  let filter = {
+    'ancestors.id': creature._id,
+    reset: resetFilter,
+    removed: { $ne: true },
+    inactive: { $ne: true },
+  };
+  // update all attribute's damage
+  filter.type = 'attribute';
+  CreatureProperties.update(filter, {
+    $set: {
+      damage: 0,
+      dirty: true,
+    }
+  }, {
+    selector: {type: 'attribute'},
+    multi: true,
+  });
+  // Update all action-like properties' usesUsed
+  filter.type = {$in: [
+    'action',
+    'attack',
+    'spell'
+  ]};
+  CreatureProperties.update(filter, {
+    $set: {
+      usesUsed: 0,
+      dirty: true,
+    }
+  }, {
+    selector: {type: 'action'},
+    multi: true,
+  });
+  // Reset half hit dice on a long rest, starting with the highest dice
+  if (restType === 'longRest'){
+    let hitDice = CreatureProperties.find({
+      'ancestors.id': creature._id,
+      type: 'attribute',
+      attributeType: 'hitDice',
+      removed: {$ne: true},
+      inactive: {$ne: true},
+    }, {
+      fields: {
+        hitDiceSize: 1,
+        damage: 1,
+        value: 1,
+      }
+    }).fetch();
+    // Use a collator to do sorting in natural order
+    let collator = new Intl.Collator('en', {
+      numeric: true, sensitivity: 'base'
+    });
+    // Get the hit dice in decending order of hitDiceSize
+    let compare = (a, b) => collator.compare(b.hitDiceSize, a.hitDiceSize)
+    hitDice.sort(compare);
+    // Get the total number of hit dice that can be recovered this rest
+    let totalHd = hitDice.reduce((sum, hd) => sum + (hd.value || 0), 0);
+    let resetMultiplier = creature.settings.hitDiceResetMultiplier || 0.5;
+    let recoverableHd = Math.max(Math.floor(totalHd*resetMultiplier), 1);
+    // recover each hit dice in turn until the recoverable amount is used up
+    let amountToRecover, resultingDamage;
+    hitDice.forEach(hd => {
+      if (!recoverableHd) return;
+      amountToRecover = Math.min(recoverableHd, hd.damage || 0);
+      if (!amountToRecover) return;
+      recoverableHd -= amountToRecover;
+      resultingDamage = hd.damage - amountToRecover;
+      CreatureProperties.update(hd._id, {
+        $set: {
+          damage: resultingDamage,
+          dirty: true,
+        }
+      }, {
+        selector: {type: 'attribute'},
+      });
+    });
+  }
+}
+
 export default restCreature;
diff --git a/app/imports/api/engine/actions/applyProperty.js b/app/imports/api/engine/actions/applyProperty.js
index 32542390..5930a93d 100644
--- a/app/imports/api/engine/actions/applyProperty.js
+++ b/app/imports/api/engine/actions/applyProperty.js
@@ -7,6 +7,7 @@ import note from './applyPropertyByType/applyNote.js';
 import roll from './applyPropertyByType/applyRoll.js';
 import savingThrow from './applyPropertyByType/applySavingThrow.js';
 import toggle from './applyPropertyByType/applyToggle.js';
+import applyTriggers from '/imports/api/engine/actions/applyTriggers.js';
 
 const applyPropertyByType = {
   action,
@@ -21,7 +22,9 @@ const applyPropertyByType = {
   toggle,
 };
 
-export default function applyProperty(node, opts, ...rest){
+export default function applyProperty(node, opts, ...rest) {
+  applyTriggers(node, opts, 'before');
   opts.scope[`#${node.node.type}`] = node.node;
-  return applyPropertyByType[node.node.type]?.(node, opts, ...rest);
+  applyPropertyByType[node.node.type]?.(node, opts, ...rest);
+  applyTriggers(node, opts, 'after');
 }
diff --git a/app/imports/api/engine/actions/applyTriggers.js b/app/imports/api/engine/actions/applyTriggers.js
new file mode 100644
index 00000000..3844ae15
--- /dev/null
+++ b/app/imports/api/engine/actions/applyTriggers.js
@@ -0,0 +1,96 @@
+import recalculateCalculation from '/imports/api/engine/actions/applyPropertyByType/shared/recalculateCalculation.js';
+import recalculateInlineCalculations from '/imports/api/engine/actions/applyPropertyByType/shared/recalculateInlineCalculations.js';
+import { getPropertyDecendants } from '/imports/api/engine/loadCreatures.js';
+import { nodeArrayToTree } from '/imports/api/parenting/nodesToTree.js';
+import applyProperty from '/imports/api/engine/actions/applyProperty.js';
+import { difference, intersection } from 'lodash';
+
+export default function applyTriggers(node, { creature, targets, scope, log }, timing) {
+  const prop = node.node;
+  const type = prop.type;
+  if (creature.triggers?.[type]?.[timing]) {
+    creature.triggers[type][timing].forEach(trigger => {
+      // Tags
+      if (!triggerMatchTags(trigger, prop)) return;
+      // Condition
+      if (trigger.condition?.parseNode) {
+        recalculateCalculation(trigger.condition, scope, log);
+        if (!trigger.condition.value) return;
+      }
+      // Apply
+      applyTrigger(trigger, { creature, targets, scope, log });
+    });
+  }
+}
+
+function triggerMatchTags(trigger, prop) {
+  let matched = false;
+  // Check the target tags
+  if (
+    !trigger.targetTags?.length ||
+    difference(trigger.targetTags, prop.tags).length === 0
+  ) {
+    matched = true;
+  }
+  // Check the extra tags
+  trigger.extraTags?.forEach(extra => {
+    if (extra.operation === 'OR') {
+      if (matched) return;
+      if (
+        !extra.tags.length ||
+        difference(extra.tags, prop.tags).length === 0
+      ) {
+        matched = true;
+      }
+    } else if (extra.operation === 'NOT') {
+      if (
+        extra.tags.length &&
+        intersection(extra.tags, prop.tags)
+      ) {
+        return false;
+      }
+    }
+  });
+  return matched;
+}
+
+export function applyTrigger(trigger, { creature, targets, scope, log }) {
+  if (trigger.firing) {
+    /*
+    log.content.push({
+      name: trigger.name || 'Trigger',
+      value: 'Trigger can\'t fire itself',
+      inline: true,
+    });
+    */
+    return;
+  }
+  trigger.firing = true;
+
+  // Fire the trigger
+  const content = {
+    name: trigger.name || 'Trigger',
+    value: trigger.summary,
+    inline: false,
+  }
+  if (trigger.summary?.text){
+    recalculateInlineCalculations(trigger.summary, scope, log);
+    content.value = trigger.summary.value;
+  }
+  log.content.push(content);
+
+  // Get all the trigger's properties and apply them
+  const properties = getPropertyDecendants(creature._id, trigger._id);
+  properties.sort((a, b) => a.order - b.order);
+  const propertyForest = nodeArrayToTree(properties);
+  propertyForest.forEach(node => {
+    applyProperty(node, {
+      creature,
+      targets,
+      scope,
+      log,
+    });
+  });
+
+  trigger.firing = false;
+}
diff --git a/app/imports/api/engine/actions/doAction.js b/app/imports/api/engine/actions/doAction.js
index c22deff2..75a4112c 100644
--- a/app/imports/api/engine/actions/doAction.js
+++ b/app/imports/api/engine/actions/doAction.js
@@ -1,14 +1,16 @@
 import SimpleSchema from 'simpl-schema';
 import { ValidatedMethod } from 'meteor/mdg:validated-method';
 import { RateLimiterMixin } from 'ddp-rate-limiter-mixin';
-import getRootCreatureAncestor from '/imports/api/creature/creatureProperties/getRootCreatureAncestor.js';
-import Creatures from '/imports/api/creature/creatures/Creatures.js';
-import CreatureVariables from '/imports/api/creature/creatures/CreatureVariables.js';
-import CreatureProperties from '/imports/api/creature/creatureProperties/CreatureProperties.js';
 import { CreatureLogSchema, insertCreatureLogWork } from '/imports/api/creature/log/CreatureLogs.js';
 import { assertEditPermission } from '/imports/api/creature/creatures/creaturePermissions.js';
 import { nodeArrayToTree } from '/imports/api/parenting/nodesToTree.js';
+import {
+  getCreature, getVariables, getProperyAncestors, getPropertyDecendants, getPropertiesOfType
+} from '/imports/api/engine/loadCreatures.js';
+import Creatures from '/imports/api/creature/creatures/Creatures.js';
+import CreatureProperties from '/imports/api/creature/creatureProperties/CreatureProperties.js';
 import applyProperty from './applyProperty.js';
+import { groupBy, remove } from 'lodash';
 
 const doAction = new ValidatedMethod({
   name: 'creatureProperties.doAction',
@@ -38,52 +40,37 @@ const doAction = new ValidatedMethod({
   run({actionId, targetIds = [], scope}) {
     let action = CreatureProperties.findOne(actionId);
 		// Check permissions
-    let creature = getRootCreatureAncestor(action);
-    const variables = CreatureVariables.findOne({
-      _creatureId: creature._id
-    }, {
-      fields: {_id: 0, _creatureId: 0},
-    });
-    creature.variables = variables;
-
+    const creatureId = action.ancestors[0].id;
+    let creature = getCreature(action.ancestors[0].id);
     assertEditPermission(creature, this.userId);
 
+    // Add the variables to the creature document
+    const variables = getVariables(creatureId);
+    delete variables._id;
+    delete variables._creatureId;
+    creature.variables = variables;
+
     // Get all the targets and make sure we can edit them
     let targets = [];
     targetIds.forEach(targetId => {
-      let target = Creatures.findOne(targetId);
+      let target = getCreature(targetId);
       assertEditPermission(target, this.userId);
-      const variables = CreatureVariables.findOne({
-        _creatureId: targetId
-      }, {
-        fields: {_id: 0, _creatureId: 0},
-      });
+
+      // add the variables to the target documents
+      const variables = getVariables(creatureId);
+      delete variables._id;
+      delete variables._creatureId;
       target.variables = variables;
+
       targets.push(target);
     });
 
-    // Fetch all the action's ancestor creatureProperties
-    const ancestorIds = [];
-    action.ancestors.forEach(ref => {
-      if (ref.collection === 'creatureProperties') {
-        ancestorIds.push(ref.id);
-      }
-    });
+    const ancestors = getProperyAncestors(creatureId, action._id);
+    ancestors.sort((a, b) => a.order - b.order);
 
-    // Get cursor of ancestors
-    const ancestors = CreatureProperties.find({
-      _id: {$in: ancestorIds},
-    }, {
-      sort: {order: 1},
-    });
-
-    // Get cursor of the properties
-    const properties = CreatureProperties.find({
-      $or: [{_id: action._id}, {'ancestors.id': action._id}],
-      removed: {$ne: true},
-    }, {
-      sort: {order: 1},
-    });
+    const properties = getPropertyDecendants(creatureId, action._id);
+    properties.push(action);
+    properties.sort((a, b) => a.order - b.order);
 
     // Do the action
     doActionWork({creature, targets, properties, ancestors, method: this, methodScope: scope});
@@ -109,6 +96,14 @@ export function doActionWork({
     throw new Meteor.Error(`The action has ${propertyForest.length} top level properties, expected 1`);
   }
 
+  // Get the triggers
+  const triggers = getPropertiesOfType(creature._id, 'trigger');
+  remove(triggers, trigger => trigger.event !== 'doActionProperty');
+  creature.triggers = groupBy(triggers, 'actionPropertyType');
+  for (let type in creature.triggers) {
+    creature.triggers[type] = groupBy(creature.triggers[type], 'timing')
+  }
+
   // Create the log
   if (!log) log = CreatureLogSchema.clean({
     creatureId: creature._id,
diff --git a/app/imports/api/engine/computation/buildCreatureComputation.js b/app/imports/api/engine/computation/buildCreatureComputation.js
index 83cadace..d99d9290 100644
--- a/app/imports/api/engine/computation/buildCreatureComputation.js
+++ b/app/imports/api/engine/computation/buildCreatureComputation.js
@@ -1,10 +1,7 @@
 import { nodeArrayToTree } from '/imports/api/parenting/nodesToTree.js';
-import CreatureProperties,
-  { DenormalisedOnlyCreaturePropertySchema as denormSchema }
+import { DenormalisedOnlyCreaturePropertySchema as denormSchema }
   from '/imports/api/creature/creatureProperties/CreatureProperties.js';
-import { loadedCreatures } from '../loadCreatures.js';
-import Creatures from '/imports/api/creature/creatures/Creatures.js';
-import CreatureVariables from '/imports/api/creature/creatures/CreatureVariables.js';
+import { getProperties, getCreature, getVariables } from '/imports/api/engine/loadCreatures.js';
 import computedOnlySchemas from '/imports/api/properties/computedOnlyPropertySchemasIndex.js';
 import computedSchemas from '/imports/api/properties/computedPropertySchemasIndex.js';
 import linkInventory from './buildComputation/linkInventory.js';
@@ -40,53 +37,6 @@ export default function buildCreatureComputation(creatureId){
   return computation;
 }
 
-function getProperties(creatureId) {
-  if (loadedCreatures.has(creatureId)) {
-    const creature = loadedCreatures.get(creatureId);
-    const props = Array.from(creature.properties.values());
-    const cloneProps = EJSON.clone(props);
-    return cloneProps
-  }
-  // console.time(`Cache miss on creature properties: ${creatureId}`)
-  const props = CreatureProperties.find({
-    'ancestors.id': creatureId,
-    'removed': {$ne: true},
-  }, {
-    sort: { order: 1 },
-    fields: { icon: 0 },
-  }).fetch();
-  // console.timeEnd(`Cache miss on creature properties: ${creatureId}`);
-  return props;
-}
-
-function getCreature(creatureId) {
-  if (loadedCreatures.has(creatureId)) {
-    const loadedCreature = loadedCreatures.get(creatureId);
-    const creature = loadedCreature.creature;
-    if (creature) return creature;
-  }
-  // console.time(`Cache miss on Creature: ${creatureId}`);
-  const creature = Creatures.findOne(creatureId, {
-    denormalizedStats: 1,
-    variables: 1,
-    dirty: 1,
-  });
-  // console.timeEnd(`Cache miss on Creature: ${creatureId}`);
-  return creature;
-}
-
-function getVariables(creatureId) {
-  if (loadedCreatures.has(creatureId)) {
-    const loadedCreature = loadedCreatures.get(creatureId);
-    const variables = loadedCreature.variables;
-    if (variables) return variables;
-  }
-  // console.time(`Cache miss on variables: ${creatureId}`);
-  const variables = CreatureVariables.findOne({_creatureId: creatureId});
-  // console.timeEnd(`Cache miss on variables: ${creatureId}`);
-  return variables;
-}
-
 export function buildComputationFromProps(properties, creature, variables){
 
   const computation = new CreatureComputation(properties, creature, variables);
diff --git a/app/imports/api/engine/loadCreatures.js b/app/imports/api/engine/loadCreatures.js
index d7a07154..9823f892 100644
--- a/app/imports/api/engine/loadCreatures.js
+++ b/app/imports/api/engine/loadCreatures.js
@@ -32,6 +32,153 @@ function unloadCreature(creatureId, subscription) {
   }
 }
 
+export function getSingleProperty(creatureId, propertyId) {
+  if (loadedCreatures.has(creatureId)) {
+    const creature = loadedCreatures.get(creatureId);
+    const property = creature.properties.get(propertyId);
+    const cloneProp = EJSON.clone(property);
+    return cloneProp;
+  }
+  // console.time(`Cache miss on creature properties: ${creatureId}`)
+  const prop = CreatureProperties.findOne({
+    _id: propertyId,
+    'ancestors.id': creatureId,
+    'removed': {$ne: true},
+  }, {
+    sort: { order: 1 },
+    fields: { icon: 0 },
+  });
+  // console.timeEnd(`Cache miss on creature properties: ${creatureId}`);
+  return prop;
+}
+
+export function getProperties(creatureId) {
+  if (loadedCreatures.has(creatureId)) {
+    const creature = loadedCreatures.get(creatureId);
+    const props = Array.from(creature.properties.values());
+    const cloneProps = EJSON.clone(props);
+    return cloneProps
+  }
+  // console.time(`Cache miss on creature properties: ${creatureId}`)
+  const props = CreatureProperties.find({
+    'ancestors.id': creatureId,
+    'removed': {$ne: true},
+  }, {
+    sort: { order: 1 },
+    fields: { icon: 0 },
+  }).fetch();
+  // console.timeEnd(`Cache miss on creature properties: ${creatureId}`);
+  return props;
+}
+
+export function getPropertiesOfType(creatureId, propType) {
+  if (loadedCreatures.has(creatureId)) {
+    const creature = loadedCreatures.get(creatureId);
+    const props = []
+    for (const prop of creature.properties.values()){
+      if (prop.type === propType) {
+        props.push(prop);
+      }
+    }
+    const cloneProps = EJSON.clone(props);
+    return cloneProps
+  }
+  // console.time(`Cache miss on creature properties: ${creatureId}`)
+  const props = CreatureProperties.find({
+    'ancestors.id': creatureId,
+    'removed': { $ne: true },
+    'type': propType,
+  }, {
+    sort: { order: 1 },
+    fields: { icon: 0 },
+  }).fetch();
+  // console.timeEnd(`Cache miss on creature properties: ${creatureId}`);
+  return props;
+}
+
+export function getCreature(creatureId) {
+  if (loadedCreatures.has(creatureId)) {
+    const loadedCreature = loadedCreatures.get(creatureId);
+    const creature = loadedCreature.creature;
+    if (creature) return creature;
+  }
+  // console.time(`Cache miss on Creature: ${creatureId}`);
+  const creature = Creatures.findOne(creatureId, {
+    denormalizedStats: 1,
+    variables: 1,
+    dirty: 1,
+  });
+  // console.timeEnd(`Cache miss on Creature: ${creatureId}`);
+  return creature;
+}
+
+export function getVariables(creatureId) {
+  if (loadedCreatures.has(creatureId)) {
+    const loadedCreature = loadedCreatures.get(creatureId);
+    const variables = loadedCreature.variables;
+    if (variables) return variables;
+  }
+  // console.time(`Cache miss on variables: ${creatureId}`);
+  const variables = CreatureVariables.findOne({_creatureId: creatureId});
+  // console.timeEnd(`Cache miss on variables: ${creatureId}`);
+  return variables;
+}
+
+export function getProperyAncestors(creatureId, propertyId) {
+  const prop = getSingleProperty(creatureId, propertyId);
+  if (!prop) return [];
+  const ancestorIds = [];
+  prop.ancestors.forEach(ref => {
+    if (ref.collection === 'creatureProperties') {
+      ancestorIds.push(ref.id);
+    }
+  });
+  if (loadedCreatures.has(creatureId)) {
+    // Get the ancestor properties from the cache
+    const creature = loadedCreatures.get(creatureId);
+    const props = [];
+    ancestorIds.forEach(id => {
+      const prop = creature.properties.get(id);
+      if (prop) {
+        props.push(prop);
+      }
+    });
+    const cloneProps = EJSON.clone(props);
+    return cloneProps
+  } else {
+    // Fetch from database
+    return CreatureProperties.find({
+      _id: { $in: ancestorIds },
+    }, {
+      sort: { order: 1 },
+    }).fetch();
+  }
+}
+
+export function getPropertyDecendants(creatureId, propertyId) {
+  const property = getSingleProperty(creatureId, propertyId);
+  if (!property) return [];
+  // This prop will always appear at the same position in the ancestor array
+  // of its decendants, so only check there
+  const expectedAncestorPostition = property.ancestors.length;
+  if (loadedCreatures.has(creatureId)) {
+    const creature = loadedCreatures.get(creatureId);
+    const props = [];
+    for(const prop of creature.properties.values()){
+      if (prop.ancestors[expectedAncestorPostition]?.id === propertyId) {
+        props.push(prop);
+      }
+    }
+    const cloneProps = EJSON.clone(props);
+    return cloneProps
+  } else {
+    return CreatureProperties.find({
+      'ancestors.id': propertyId,
+      removed: { $ne: true },
+    }).fetch();
+  }
+}
+
 class LoadedCreature {
   constructor(sub, creatureId) {
     // This may be called from a subscription, but we don't want the observers
diff --git a/app/imports/api/properties/Actions.js b/app/imports/api/properties/Actions.js
index ccda82d1..53e57afa 100644
--- a/app/imports/api/properties/Actions.js
+++ b/app/imports/api/properties/Actions.js
@@ -5,9 +5,6 @@ import STORAGE_LIMITS from '/imports/constants/STORAGE_LIMITS.js';
 
 /*
  * Actions are things a character can do
- * Any rolls that are children of actions will be rolled when taking the action
- * Any actions that are children of this action will be considered alternatives
- * to this action
  */
 let ActionSchema = createPropertySchema({
   name: {
diff --git a/app/imports/api/properties/Triggers.js b/app/imports/api/properties/Triggers.js
new file mode 100644
index 00000000..3b9b0d13
--- /dev/null
+++ b/app/imports/api/properties/Triggers.js
@@ -0,0 +1,136 @@
+import SimpleSchema from 'simpl-schema';
+import createPropertySchema from '/imports/api/properties/subSchemas/createPropertySchema.js';
+import STORAGE_LIMITS from '/imports/constants/STORAGE_LIMITS.js';
+
+const eventOptions = {
+  doActionProperty: 'Do action',
+  // receiveActionProperty: 'Receiving action property',
+  // flipToggle: 'Toggle changed',
+  // adjustProperty: 'Attribute adjusted',
+  anyRest: 'Short or long rest',
+  longRest: 'Long rest',
+  shortRest: 'Short rest',
+}
+
+const timingOptions = {
+  before: 'Before',
+  after: 'After',
+}
+
+const actionPropertyTypeOptions = {
+  action: 'Action',
+  adjustment: 'Attribute damage',
+  branch: 'Branch',
+  buff: 'Buff',
+  damage: 'Damage',
+  note: 'Note',
+  roll: 'Roll',
+  savingThrow: 'Saving throw',
+  toggle: 'Toggle',
+}
+
+/*
+ * Triggers are like actions that fire themselves when certain things happen on
+ * the sheet. Either during another action or as its own action after a sheet
+ * event. The same trigger can't fire twice in the same action step.
+ */
+let TriggerSchema = createPropertySchema({
+  name: {
+    type: String,
+    optional: true,
+    max: STORAGE_LIMITS.name,
+  },
+  summary: {
+    type: 'inlineCalculationFieldToCompute',
+    optional: true,
+  },
+  description: {
+    type: 'inlineCalculationFieldToCompute',
+    optional: true,
+  },
+  event: {
+    type: String,
+    allowedValues: Object.keys(eventOptions),
+    defaultValue: 'doActionProperty',
+  },
+  // Action type
+  actionPropertyType: {
+    type: String,
+    allowedValues: Object.keys(actionPropertyTypeOptions),
+    optional: true,
+  },
+  timing: {
+    type: String,
+    allowedValues: Object.keys(timingOptions),
+    defaultValue: 'after',
+  },
+  condition: {
+    type: 'fieldToCompute',
+    optional: true,
+    parseLevel: 'compile',
+  },
+  // Which tags the trigger is applied to
+  targetTags: {
+    type: Array,
+    optional: true,
+    maxCount: STORAGE_LIMITS.tagCount,
+  },
+  'targetTags.$': {
+    type: String,
+    max: STORAGE_LIMITS.tagLength,
+  },
+  extraTags: {
+    type: Array,
+    optional: true,
+    maxCount: STORAGE_LIMITS.extraTagsCount,
+  },
+  'extraTags.$': {
+    type: Object,
+  },
+  'extraTags.$._id': {
+    type: String,
+    regEx: SimpleSchema.RegEx.Id,
+    autoValue(){
+      if (!this.isSet) return Random.id();
+    }
+  },
+  'extraTags.$.operation': {
+    type: String,
+    allowedValues: ['OR', 'NOT'],
+    defaultValue: 'OR',
+  },
+  'extraTags.$.tags': {
+    type: Array,
+    defaultValue: [],
+    maxCount: STORAGE_LIMITS.tagCount,
+  },
+  'extraTags.$.tags.$': {
+    type: String,
+    max: STORAGE_LIMITS.tagLength,
+  },
+});
+
+const ComputedOnlyTriggerSchema = createPropertySchema({
+  summary: {
+    type: 'computedOnlyInlineCalculationField',
+    optional: true,
+  },
+  description: {
+    type: 'computedOnlyInlineCalculationField',
+    optional: true,
+  },
+  condition: {
+    type: 'computedOnlyField',
+    optional: true,
+    parseLevel: 'compile',
+  },
+});
+
+const ComputedTriggerSchema = new SimpleSchema()
+  .extend(TriggerSchema)
+  .extend(ComputedOnlyTriggerSchema);
+
+export {
+  TriggerSchema, ComputedOnlyTriggerSchema, ComputedTriggerSchema,
+  eventOptions, timingOptions, actionPropertyTypeOptions
+};
diff --git a/app/imports/api/properties/computedOnlyPropertySchemasIndex.js b/app/imports/api/properties/computedOnlyPropertySchemasIndex.js
index d47d560d..d490e4e3 100644
--- a/app/imports/api/properties/computedOnlyPropertySchemasIndex.js
+++ b/app/imports/api/properties/computedOnlyPropertySchemasIndex.js
@@ -25,6 +25,7 @@ import { ComputedOnlySlotFillerSchema } from '/imports/api/properties/SlotFiller
 import { ComputedOnlySpellSchema } from '/imports/api/properties/Spells.js';
 import { ComputedOnlySpellListSchema } from '/imports/api/properties/SpellLists.js';
 import { ComputedOnlyToggleSchema } from '/imports/api/properties/Toggles.js';
+import { ComputedOnlyTriggerSchema } from '/imports/api/properties/Triggers.js';
 
 const propertySchemasIndex = {
   action: ComputedOnlyActionSchema,
@@ -53,6 +54,7 @@ const propertySchemasIndex = {
   spellList: ComputedOnlySpellListSchema,
   spell: ComputedOnlySpellSchema,
   toggle: ComputedOnlyToggleSchema,
+  trigger: ComputedOnlyTriggerSchema,
   any: new SimpleSchema({}),
 };
 
diff --git a/app/imports/api/properties/computedPropertySchemasIndex.js b/app/imports/api/properties/computedPropertySchemasIndex.js
index 1fa8c9d8..9084e3b7 100644
--- a/app/imports/api/properties/computedPropertySchemasIndex.js
+++ b/app/imports/api/properties/computedPropertySchemasIndex.js
@@ -25,6 +25,7 @@ import { SlotFillerSchema } from '/imports/api/properties/SlotFillers.js';
 import { ComputedSpellSchema } from '/imports/api/properties/Spells.js';
 import { ComputedSpellListSchema } from '/imports/api/properties/SpellLists.js';
 import { ComputedToggleSchema } from '/imports/api/properties/Toggles.js';
+import { ComputedTriggerSchema } from '/imports/api/properties/Triggers.js';
 
 const propertySchemasIndex = {
   action: ComputedActionSchema,
@@ -51,6 +52,7 @@ const propertySchemasIndex = {
   spellList: ComputedSpellListSchema,
   spell: ComputedSpellSchema,
   toggle: ComputedToggleSchema,
+  trigger: ComputedTriggerSchema,
   container: ComputedContainerSchema,
   item: ComputedItemSchema,
   any: new SimpleSchema({}),
diff --git a/app/imports/api/properties/propertySchemasIndex.js b/app/imports/api/properties/propertySchemasIndex.js
index 0cba80a0..cc4b77ee 100644
--- a/app/imports/api/properties/propertySchemasIndex.js
+++ b/app/imports/api/properties/propertySchemasIndex.js
@@ -23,6 +23,7 @@ import { SlotFillerSchema } from '/imports/api/properties/SlotFillers.js';
 import { SpellListSchema } from '/imports/api/properties/SpellLists.js';
 import { SpellSchema } from '/imports/api/properties/Spells.js';
 import { ToggleSchema } from '/imports/api/properties/Toggles.js';
+import { TriggerSchema } from '/imports/api/properties/Triggers.js';
 import { ContainerSchema } from '/imports/api/properties/Containers.js';
 import { ItemSchema } from '/imports/api/properties/Items.js';
 
@@ -51,6 +52,7 @@ const propertySchemasIndex = {
   spellList: SpellListSchema,
   spell: SpellSchema,
   toggle: ToggleSchema,
+  trigger: TriggerSchema,
   container: ContainerSchema,
   item: ItemSchema,
   any: new SimpleSchema({}),
diff --git a/app/imports/constants/PROPERTIES.js b/app/imports/constants/PROPERTIES.js
index 503f893e..c2aa3be1 100644
--- a/app/imports/constants/PROPERTIES.js
+++ b/app/imports/constants/PROPERTIES.js
@@ -159,6 +159,12 @@ const PROPERTIES = Object.freeze({
     helpText: 'Togggles allow parts of the character sheet to be turned on and off, either manually or as the result of a calculation.',
     suggestedParents: [],
   },
+  trigger: {
+    icon: 'mdi-electric-switch',
+    name: 'Trigger',
+    helpText: 'Triggers apply their children in response to events on the character sheet, such as taking an action or receiving damage',
+    suggestedParents: [],
+  },
 });
 
 export default PROPERTIES;
diff --git a/app/imports/ui/properties/forms/TriggerForm.vue b/app/imports/ui/properties/forms/TriggerForm.vue
new file mode 100644
index 00000000..59e7f479
--- /dev/null
+++ b/app/imports/ui/properties/forms/TriggerForm.vue
@@ -0,0 +1,206 @@
+<template lang="html">
+  <div class="slot-form">
+    <text-field
+      ref="focusFirst"
+      label="Name"
+      :value="model.name"
+      :error-messages="errors.name"
+      @change="change('name', ...arguments)"
+    />
+
+    <v-layout align-center>
+      <v-btn
+        icon
+        style="margin-top: -30px;"
+        class="mr-2"
+        :loading="addExtraTagsLoading"
+        :disabled="extraTagsFull"
+        @click="addExtraTags"
+      >
+        <v-icon>
+          mdi-plus
+        </v-icon>
+      </v-btn>
+      <smart-combobox
+        label="Tags Required"
+        hint="The slot must be filled with a property which has all the listed tags"
+        multiple
+        chips
+        deletable-chips
+        :value="model.targetTags"
+        :error-messages="errors.targetTags"
+        @change="change('targetTags', ...arguments)"
+      />
+    </v-layout>
+    <v-slide-x-transition group>
+      <div
+        v-for="(extras, i) in model.extraTags"
+        :key="extras._id"
+        class="extra-tags layout align-center justify-space-between"
+      >
+        <smart-select
+          label="Operation"
+          style="width: 90px; flex-grow: 0;"
+          :items="extraTagOperations"
+          :value="extras.operation"
+          :error-messages="errors.extraTags && errors.extraTags[i]"
+          @change="change(['extraTags', i, 'operation'], ...arguments)"
+        />
+        <smart-combobox
+          label="Tags"
+          :hint="extras.operation === 'OR' ? 'The slot can be filled with a property that has all of these tags instead' : 'The slot cannot be filled with a property that has any of these tags'"
+          class="mx-2"
+          multiple
+          chips
+          deletable-chips
+          :value="extras.tags"
+          @change="change(['extraTags', i, 'tags'], ...arguments)"
+        />
+        <v-btn
+          icon
+          style="margin-top: -30px;"
+          @click="$emit('pull', {path: ['extraTags', i]})"
+        >
+          <v-icon>mdi-delete</v-icon>
+        </v-btn>
+      </div>
+    </v-slide-x-transition>
+
+    <smart-select
+      label="Timing"
+      style="flex-basis: 300px;"
+      hint="When this trigger will fire"
+      :items="timingOptions"
+      :value="model.timing"
+      :error-messages="errors.timing"
+      @change="change('timing', ...arguments)"
+    />
+    <smart-select
+      label="Event"
+      style="flex-basis: 300px;"
+      hint="What causes this trigger to fire"
+      :items="eventOptions"
+      :value="model.event"
+      :error-messages="errors.event"
+      @change="change('event', ...arguments)"
+    />
+    <smart-select
+      v-if="model.event === 'doActionProperty' || model.event === 'receiveActionProperty'"
+      label="Event Type"
+      style="flex-basis: 300px;"
+      hint="Which action event causes this trigger to fire"
+      :items="actionPropertyTypeOptions"
+      :value="model.actionPropertyType"
+      :error-messages="errors.actionPropertyType"
+      @change="change('actionPropertyType', ...arguments)"
+    />
+
+    <computed-field
+      label="Condition"
+      hint="A caclulation to determine if this trigger should fire"
+      placeholder="Always active"
+      :model="model.condition"
+      :error-messages="errors.condition"
+      @change="({path, value, ack}) =>
+        $emit('change', {path: ['condition', ...path], value, ack})"
+    />
+
+    <inline-computation-field
+      label="Summary"
+      hint="This will appear in the feature card in the character sheet"
+      :model="model.summary"
+      :error-messages="errors.summary"
+      @change="({path, value, ack}) =>
+        $emit('change', {path: ['summary', ...path], value, ack})"
+    />
+
+    <inline-computation-field
+      label="Description"
+      hint="The rest of the description that doesn't fit in the summary goes here"
+      :model="model.description"
+      :error-messages="errors.description"
+      @change="({path, value, ack}) =>
+        $emit('change', {path: ['description', ...path], value, ack})"
+    />
+
+    <form-sections>
+      <form-section
+        v-if="$slots.children"
+        name="Children"
+      >
+        <slot name="children" />
+      </form-section>
+
+      <form-section
+        name="Advanced"
+      >
+        <smart-combobox
+          label="Tags"
+          hint="This trigger's own tags"
+          multiple
+          chips
+          deletable-chips
+          :value="model.tags"
+          @change="change('tags', ...arguments)"
+        />
+      </form-section>
+    </form-sections>
+  </div>
+</template>
+
+<script lang="js">
+import propertyFormMixin from '/imports/ui/properties/forms/shared/propertyFormMixin.js';
+import FormSection from '/imports/ui/properties/forms/shared/FormSection.vue';
+import {
+  TriggerSchema, eventOptions, timingOptions, actionPropertyTypeOptions
+} from '/imports/api/properties/Triggers.js';
+
+export default {
+  components: {
+    FormSection,
+  },
+  mixins: [propertyFormMixin],
+  inject: {
+    context: { default: {} }
+  },
+  data(){
+    return {
+      addExtraTagsLoading: false,
+      extraTagOperations: ['OR', 'NOT'],
+      eventOptions: Object.keys(eventOptions).map(value => {
+        return { value, text: eventOptions[value] };
+      }),
+      timingOptions: Object.keys(timingOptions).map(value => {
+        return { value, text: timingOptions[value] };
+      }),
+      actionPropertyTypeOptions: Object.keys(actionPropertyTypeOptions).map(value => {
+        return { value, text: actionPropertyTypeOptions[value] };
+      }),
+    };
+  },
+  computed: {
+    extraTagsFull(){
+      if (!this.model.extraTags) return false;
+      let maxCount = TriggerSchema.get('extraTags', 'maxCount');
+      return this.model.extraTags.length >= maxCount;
+    }
+  },
+  methods: {
+    acknowledgeAddResult(){
+      this.addExtraTagsLoading = false;
+    },
+    addExtraTags(){
+      this.addExtraTagsLoading = true;
+      this.$emit('push', {
+        path: ['extraTags'],
+        value: {
+          _id: Random.id(),
+          operation: 'OR',
+          tags: [],
+        },
+        ack: this.acknowledgeAddResult,
+      });
+    },
+  },
+};
+</script>
diff --git a/app/imports/ui/properties/forms/shared/propertyFormIndex.js b/app/imports/ui/properties/forms/shared/propertyFormIndex.js
index 1687a2cb..1aa8f42e 100644
--- a/app/imports/ui/properties/forms/shared/propertyFormIndex.js
+++ b/app/imports/ui/properties/forms/shared/propertyFormIndex.js
@@ -24,6 +24,7 @@ const SlotFillerForm = () => import('/imports/ui/properties/forms/SlotFillerForm
 const SpellListForm = () => import('/imports/ui/properties/forms/SpellListForm.vue');
 const SpellForm = () => import('/imports/ui/properties/forms/SpellForm.vue');
 const ToggleForm = () => import('/imports/ui/properties/forms/ToggleForm.vue');
+const TriggerForm = () => import('/imports/ui/properties/forms/TriggerForm.vue');
 
 export default {
   action: ActionForm,
@@ -52,4 +53,5 @@ export default {
   spellList: SpellListForm,
   spell: SpellForm,
   toggle: ToggleForm,
+  trigger: TriggerForm,
 };
diff --git a/app/imports/ui/properties/viewers/TriggerViewer.vue b/app/imports/ui/properties/viewers/TriggerViewer.vue
new file mode 100644
index 00000000..dbecd9c3
--- /dev/null
+++ b/app/imports/ui/properties/viewers/TriggerViewer.vue
@@ -0,0 +1,74 @@
+<template lang="html">
+  <div class="trigger-viewer">
+    <v-row dense>
+      <property-field
+        name="Event"
+        :value="eventText"
+      />
+      <property-field
+        v-if="(model.targetTags && model.targetTags.length) || (model.extraTags && model.extraTags.length)"
+        name="Tags Required"
+        :cols="{cols: 12}"
+      >
+        <div>
+          <property-tags :tags="model.targetTags" />
+          <div
+            v-for="tags in model.extraTags"
+            :key="tags._id"
+          >
+            <div class="text-caption">
+              {{ tags.operation }}
+            </div>
+            <property-tags :tags="tags.tags" />
+          </div>
+        </div>
+      </property-field>
+      <property-description
+        name="Summary"
+        :model="model.summary"
+      />
+      <property-description
+        name="Description"
+        :model="model.description"
+      />
+    </v-row>
+  </div>
+</template>
+
+<script lang="js">
+	import propertyViewerMixin from '/imports/ui/properties/viewers/shared/propertyViewerMixin.js'
+  import { getPropertyName } from '/imports/constants/PROPERTIES.js';
+  import FillSlotButton from '/imports/ui/creature/buildTree/FillSlotButton.vue';
+
+  const eventText = {
+    doActionProperty: 'Do action property',
+    receiveActionProperty: 'Receiving action property',
+    flipToggle: 'Toggle changed',
+    adjustProperty: 'Attribute adjusted',
+    anyRest: 'Short or long rest',
+    longRest: 'Long rest',
+    shortRest: 'Short rest',
+  }
+
+	export default {
+    components: {
+      FillSlotButton,
+    },
+		mixins: [propertyViewerMixin],
+    inject: {
+      context: {
+        default: {},
+      },
+    },
+    computed: {
+      slotTypeName(){
+        if (!this.model.slotType) return;
+        return getPropertyName(this.model.slotType);
+      },
+      eventText(){
+        if (!this.model.event) return;
+        return eventText[this.model.event]
+      },
+    }
+	}
+</script>
diff --git a/app/imports/ui/properties/viewers/shared/propertyViewerIndex.js b/app/imports/ui/properties/viewers/shared/propertyViewerIndex.js
index 1df889ee..572bfad0 100644
--- a/app/imports/ui/properties/viewers/shared/propertyViewerIndex.js
+++ b/app/imports/ui/properties/viewers/shared/propertyViewerIndex.js
@@ -24,6 +24,7 @@ const SlotFillerViewer = () => import ('/imports/ui/properties/viewers/SlotFille
 const SpellListViewer = () => import ('/imports/ui/properties/viewers/SpellListViewer.vue');
 const SpellViewer = () => import ('/imports/ui/properties/viewers/SpellViewer.vue');
 const ToggleViewer = () => import ('/imports/ui/properties/viewers/ToggleViewer.vue');
+const TriggerViewer = () => import ('/imports/ui/properties/viewers/TriggerViewer.vue');
 
 export default {
   action: ActionViewer,
@@ -52,4 +53,5 @@ export default {
   spellList: SpellListViewer,
   spell: SpellViewer,
   toggle: ToggleViewer,
+  trigger: TriggerViewer,
 };