Add shape change ability power effect

src/module/powers/powers.js

@@ -52,7 +52,7 @@ import { ReliefEffect } from './relief.js';
 import { ResurrectionEffect } from './resurrection.js';
 import { SanctuaryEffect } from './sanctuary.js';
 import { ScryingEffect } from './scrying.js';
-import { ShapeChangeEffect } from './shapeChange.js';
+import { ShapeChangeEffect, ShapeChangeAbilityEffect } from './shapeChange.js';
 import { SlothSpeedEffect } from './slothSpeed.js';
 import { SlumberEffect } from './slumber.js';
 import { SmiteEffect } from './smite.js';
@@ -150,6 +150,8 @@ const PowerClasses = {
   sanctuary: SanctuaryEffect,
   scrying: ScryingEffect,
   'shape-change': ShapeChangeEffect,
+  'shape-change-ability': ShapeChangeAbilityEffect,
+  'shape-change-action': ShapeChangeAbilityEffect,
   shrink: GrowthShrinkEffect,
   silence: SoundSilenceEffect,
   slothspeed: SlothSpeedEffect,

src/module/powers/shapeChange.js

@@ -216,6 +216,37 @@ export class ShapeChangeEffect extends ActorFolderEffect {
   }
 }
 
+export class ShapeChangeAbilityEffect extends ShapeChangeEffect {
+  get name() {
+    return 'Shape Change Ability';
+  }
+
+  get duration() {
+    return 500;
+  }
+
+  get isTargeted() {
+    return false;
+  }
+
+  get isRaisable() {
+    return false;
+  }
+
+  actorValue(actor) {
+    return 0;
+  }
+
+  get modifiers() {
+    return super.modifiers.filter((m) => m.id === 'actorId');
+  }
+
+  async parseValues() {
+    this.targets = [this.source];
+    await super.parseValues();
+  }
+}
+
 export async function shapeChangeTokenDeleteHandler(token, options, userId) {
   if (token.flags?.['multilevel-tokens']?.stoken) {
     // if the deleted token is a dummy token from multilevel-tokens, ignore it