Completed functionality

module/data/activeEffect/baseEffect.mjs

@@ -112,6 +112,9 @@ export default class BaseEffect extends foundry.data.ActiveEffectTypeDataModel {
                     initial: CONFIG.DH.GENERAL.range.veryClose.id,
                     label: 'DAGGERHEART.ACTIVEEFFECT.Config.area.size'
                 }),
+                targetDispositions: new fields.SetField(new fields.NumberField({
+
+                })),
             }, { nullable: true, initial: null })
         };
     }

module/data/regionBehavior/_module.mjs

@@ -0,0 +1 @@
+export { default as applyActiveEffect } from './applyActiveEffect.mjs';

module/data/regionBehavior/applyActiveEffect.mjs

@@ -0,0 +1,14 @@
+export default class DhApplyActiveEffect extends CONFIG.RegionBehavior.dataModels.applyActiveEffect {
+    static #tokenDispositionChecker = (eventFunction) => (event) => {
+        const { token } = event.data;
+        if (token.disposition === -1) {
+            eventFunction.bind(this)(event);
+        }
+    } 
+
+    /** @override */
+    static events = Object.entries(super.events).reduce((acc, [key, func]) => {
+        acc[key] = DhApplyActiveEffect.#tokenDispositionChecker(func);
+        return acc;
+    }, {});
+}