diff --git a/lang/en.json b/lang/en.json
index 644ea5fa76..503d178ce3 100644
--- a/lang/en.json
+++ b/lang/en.json
@@ -156,8 +156,10 @@
 },
 
 "DND5E.ACTIVITY": {
-  "Label": "Activity",
-  "LabelPl": "Activities",
+  "Title": {
+    "one": "Activity",
+    "other": "Activities"
+  },
   "FIELDS": {
     "activation": {
       "label": "Activation",
@@ -207,6 +209,9 @@
         "hint": "Value of the duration in the specified units, if applicable."
       }
     },
+    "effects": {
+      "label": "Applied Effects"
+    },
     "img": {
       "label": "Icon"
     },
@@ -740,7 +745,7 @@
 "DND5E.ConsumableWithoutCharges": "available units to use",
 "DND5E.Consumption": {
   "Action": {
-    "Add": "Add Consumption Target",
+    "Create": "Create Consumption Target",
     "Delete": "Delete Consumption Target"
   },
   "Scaling": {
@@ -943,6 +948,12 @@
 "DND5E.Dusk": "Dusk",
 "DND5E.Effect": "Effect",
 "DND5E.Effects": "Effects",
+"DND5E.EFFECT": {
+  "Action": {
+    "Create": "Create Effect",
+    "Delete": "Delete Effect"
+  }
+},
 "DND5E.EffectsApplyTokens": "Apply to selected tokens",
 "DND5E.EffectApplyWarningConcentration": "Applying an effect that is being concentrated on by another character requires GM permissions.",
 "DND5E.EffectApplyWarningOwnership": "Effects cannot be applied to tokens you are not the owner of.",
@@ -2137,7 +2148,7 @@
   },
   "Recovery": {
     "Action": {
-      "Add": "Add Recovery Profile",
+      "Create": "Create Recovery Profile",
       "Delete": "Delete Recovery Profile"
     },
     "Recharge": {
diff --git a/module/applications/activity/activity-sheet.mjs b/module/applications/activity/activity-sheet.mjs
index a163bb20f3..4f353f25d7 100644
--- a/module/applications/activity/activity-sheet.mjs
+++ b/module/applications/activity/activity-sheet.mjs
@@ -24,8 +24,10 @@ export default class ActivitySheet extends Application5e {
     },
     actions: {
       addConsumption: ActivitySheet.#addConsumption,
+      addEffect: ActivitySheet.#addEffect,
       addRecovery: ActivitySheet.#addRecovery,
       deleteConsumption: ActivitySheet.#deleteConsumption,
+      deleteEffect: ActivitySheet.#deleteEffect,
       deleteRecovery: ActivitySheet.#deleteRecovery
     },
     form: {
@@ -59,7 +61,10 @@ export default class ActivitySheet extends Application5e {
       ]
     },
     effect: {
-      template: "systems/dnd5e/templates/activity/effect.hbs"
+      template: "systems/dnd5e/templates/activity/effect.hbs",
+      templates: [
+        "systems/dnd5e/templates/activity/parts/activity-effects.hbs"
+      ]
     }
   };
 
@@ -277,6 +282,12 @@ export default class ActivitySheet extends Application5e {
    */
   async _prepareEffectContext(context) {
     context.tab = context.tabs.effect;
+
+    const appliedEffects = new Set(context.activity.effects.map(e => e.id));
+    context.allEffects = this.item.effects.map(effect => ({
+      value: effect.id, label: effect.name, selected: appliedEffects.has(effect.id)
+    }));
+
     return context;
   }
 
@@ -358,7 +369,7 @@ export default class ActivitySheet extends Application5e {
   /** @override */
   _canRender(options) {
     if ( !this.isVisible ) throw new Error(game.i18n.format("SHEETS.DocumentSheetPrivate", {
-      type: game.i18n.localize("DND5E.ACTIVITY.Label")
+      type: game.i18n.localize("DND5E.ACTIVITY.Title.one")
     }));
   }
 
@@ -377,6 +388,15 @@ export default class ActivitySheet extends Application5e {
     this.activity.constructor._unregisterApp(this.activity, this);
   }
 
+  /* -------------------------------------------- */
+
+  /** @inheritDoc */
+  async _renderFrame(options) {
+    const frame = await super._renderFrame(options);
+    frame.autocomplete = "off";
+    return frame;
+  }
+
   /* -------------------------------------------- */
   /*  Event Listeners and Handlers                */
   /* -------------------------------------------- */
@@ -401,6 +421,25 @@ export default class ActivitySheet extends Application5e {
 
   /* -------------------------------------------- */
 
+  /**
+   * Handle creating a new active effect and adding it to the applied effects list.
+   * @this {ActivityConfig}
+   * @param {Event} event         Triggering click event.
+   * @param {HTMLElement} target  Button that was clicked.
+   */
+  static async #addEffect(event, target) {
+    const effectData = {
+      name: this.item.name,
+      img: this.item.img,
+      origin: this.item.uuid,
+      transfer: false
+    };
+    const [created] = await this.item.createEmbeddedDocuments("ActiveEffect", [effectData]);
+    this.activity.update({ effects: [...this.activity.toObject().effects, { id: created.id }] });
+  }
+
+  /* -------------------------------------------- */
+
   /**
    * Handle adding a new entry to the uses recovery list.
    * @this {ActivityConfig}
@@ -437,6 +476,23 @@ export default class ActivitySheet extends Application5e {
 
   /* -------------------------------------------- */
 
+  /**
+   * Handle deleting an active effect and removing it from the applied effects list.
+   * @this {ActivityConfig}
+   * @param {Event} event         Triggering click event.
+   * @param {HTMLElement} target  Button that was clicked.
+   */
+  static async #deleteEffect(event, target) {
+    const effectId = target.closest("[data-effect-id]")?.dataset.effectId;
+    const result = await this.item.effects.get(effectId)?.deleteDialog();
+    if ( result instanceof ActiveEffect ) {
+      const effects = this.activity.toObject().effects.filter(e => e.id !== effectId);
+      this.activity.update({ effects });
+    }
+  }
+
+  /* -------------------------------------------- */
+
   /**
    * Handle removing an entry from the uses recovery list.
    * @this {ActivityConfig}
@@ -474,6 +530,14 @@ export default class ActivitySheet extends Application5e {
    */
   _prepareSubmitData(event, formData) {
     const submitData = foundry.utils.expandObject(formData.object);
+    if ( foundry.utils.hasProperty(submitData, "appliedEffects") ) {
+      const effects = submitData.effects ?? this.activity.toObject().effects;
+      submitData.effects = effects.filter(e => submitData.appliedEffects.includes(e.id));
+      for ( const id of submitData.appliedEffects ) {
+        if ( submitData.effects.find(e => e.id === id) ) continue;
+        submitData.effects.push({ id });
+      }
+    }
     if ( foundry.utils.hasProperty(submitData, "consumption.targets") ) {
       submitData.consumption.targets = Object.values(submitData.consumption.targets);
     }
diff --git a/module/data/activity/base-activity.mjs b/module/data/activity/base-activity.mjs
index cf41016b1e..195d695a58 100644
--- a/module/data/activity/base-activity.mjs
+++ b/module/data/activity/base-activity.mjs
@@ -19,6 +19,13 @@ const {
  * @property {string} scaling.formula  Specific scaling formula if not automatically calculated from target's value.
  */
 
+/**
+ * Data for effects that can be applied.
+ *
+ * @typedef {object} EffectApplicationData
+ * @property {string} effect  ID of the effect to apply.
+ */
+
 /**
  * Data for a recovery profile for an activity's uses.
  *
@@ -48,6 +55,7 @@ const {
  * @property {string} duration.value             Scalar value for the activity's duration.
  * @property {string} duration.units             Units that are used for the duration.
  * @property {string} duration.special           Description of any special duration details.
+ * @property {EffectApplicationData[]} effects   Linked effects that can be applied.
  * @property {object} range
  * @property {string} range.value                Scalar value for the activity's range.
  * @property {string} range.units                Units that are used for the range.
@@ -120,6 +128,9 @@ export default class BaseActivityData extends foundry.abstract.DataModel {
         units: new StringField({ initial: "inst" }),
         special: new StringField()
       }),
+      effects: new ArrayField(new SchemaField({
+        id: new DocumentIdField()
+      })),
       range: new SchemaField({
         value: new FormulaField({ deterministic: true }),
         units: new StringField(),
@@ -156,6 +167,11 @@ export default class BaseActivityData extends foundry.abstract.DataModel {
   prepareData() {
     this.name = this.name || game.i18n.localize(this.metadata?.title);
     this.img = this.img || this.metadata?.img;
+    const item = this.item;
+    this.effects.forEach(e => Object.defineProperty(e, "effect", {
+      get() { return item.effects.get(e.id); },
+      configurable: true
+    }));
     UsesField.prepareData.call(this, this.getRollData({ deterministic: true }));
   }
 
diff --git a/module/documents/mixins/pseudo-document.mjs b/module/documents/mixins/pseudo-document.mjs
index 0dbef4877b..0155f71aef 100644
--- a/module/documents/mixins/pseudo-document.mjs
+++ b/module/documents/mixins/pseudo-document.mjs
@@ -159,7 +159,9 @@ export default Base => class extends Base {
    * @param {RenderOptions} [options]  Rendering options.
    */
   render(options) {
-    for ( const app of this.constructor._apps.get(this.uuid) ?? [] ) app.render(options);
+    for ( const app of this.constructor._apps.get(this.uuid) ?? [] ) {
+      app.render({ window: { title: app.title }, ...options });
+    }
   }
 
   /* -------------------------------------------- */
diff --git a/templates/activity/effect.hbs b/templates/activity/effect.hbs
index 66f7d81821..f50c8b0240 100644
--- a/templates/activity/effect.hbs
+++ b/templates/activity/effect.hbs
@@ -1,3 +1,3 @@
 <section class="tab activity-{{ tab.id }} {{ tab.cssClass }}" data-tab="{{ tab.id }}" data-group="{{ tab.group }}">
-    TODO: Active effects to apply & effects from specific activity types
+    {{> "systems/dnd5e/templates/activity/parts/activity-effects.hbs" }}
 </section>
diff --git a/templates/activity/parts/activity-consumption.hbs b/templates/activity/parts/activity-consumption.hbs
index 9b67690189..65a8c13a37 100644
--- a/templates/activity/parts/activity-consumption.hbs
+++ b/templates/activity/parts/activity-consumption.hbs
@@ -25,7 +25,7 @@
             {{/each}}
         </ul>
         <button type="button" class="unbutton" data-action="addConsumption">
-            {{ localize "DND5E.Consumption.Action.Add" }}
+            {{ localize "DND5E.Consumption.Action.Create" }}
         </button>
     </fieldset>
 
diff --git a/templates/activity/parts/activity-effects.hbs b/templates/activity/parts/activity-effects.hbs
new file mode 100644
index 0000000000..6ff9a9d86b
--- /dev/null
+++ b/templates/activity/parts/activity-effects.hbs
@@ -0,0 +1,20 @@
+<fieldset>
+    <legend>{{ localize "DND5E.ACTIVITY.FIELDS.effects.label" }}</legend>
+    <multi-select name="appliedEffects">
+        {{ selectOptions allEffects }}
+    </multi-select>
+    <ul class="unlist">
+        {{#each activity.effects}}
+        <li data-index="{{ @index }}" data-effect-id="{{ id }}" class="flexrow">
+            <img class="gold-icon" src="{{ effect.img }}" alt="{{ effect.name }}">
+            <span class="name">{{{ dnd5e-linkForUuid effect.uuid }}}</span>
+            <button type="button" class="unbutton" data-action="deleteEffect">
+                {{ localize "DND5E.EFFECT.Action.Delete" }}
+            </button>
+        </li>
+        {{/each}}
+    </ul>
+    <button type="button" class="unbutton" data-action="addEffect">
+        {{ localize "DND5E.EFFECT.Action.Create" }}
+    </button>
+</fieldset>
diff --git a/templates/shared/uses-recovery.hbs b/templates/shared/uses-recovery.hbs
index 55e0fd74d9..d8f3127144 100644
--- a/templates/shared/uses-recovery.hbs
+++ b/templates/shared/uses-recovery.hbs
@@ -17,6 +17,6 @@
         {{/each}}
     </ul>
     <button type="button" class="unbutton" data-action="addRecovery">
-        {{ localize "DND5E.USES.Recovery.Action.Add" }}
+        {{ localize "DND5E.USES.Recovery.Action.Create" }}
     </button>
 </fieldset>