const tokens = canvas.tokens.controlled;
const actors = tokens.map((t) => t.actor);
const EFFECT_OBJECT = {
  name: 'Effect',
  type: 'macro',
  dice: null,
  resourcesUsed: null,
  modifier: '',
  override: '',
  uuid: 'Compendium.swade-mb-helpers.helper-macros.Macro.AjuA11hQ48UJNwlH',
  macroActor: 'self',
  isHeavyWeapon: false,
};
for (const actor of actors) {
  const updates = [];
  for (const power of actor.items.filter((i) => i.type === 'power')) {
    if (Object.values(power.system.actions.additional).find((action) => action.name === 'Effect')) {
      continue;
    }
    const _id = power.id;
    const additional = foundry.utils.deepClone(power.system.actions.additional);
    additional[foundry.utils.randomID(8)] = foundry.utils.deepClone(EFFECT_OBJECT);
    updates.push({ _id, 'system.actions.additional': additional });
  }
  if (updates.length > 0) {
    actor.updateEmbeddedDocuments('Item', updates);
  }
}