I really like this mechanic here.... except the Ugar pact boon looks really useless... A pact boon that lets you move the zone created by a daily power? um what if your cursed drops and you havn't used that daily this encounter?
I don't think you gain access to a particular vestige's pact boon without expending the daily power first.
Pact Boon: You have a pact boon associated with your active vestige. When an enemy under your Warlock’s Curse drops to 0 hit points or fewer, you gain the benefit of your active vestige’s pact boon.
I don't think you gain access to a particular vestige's pact boon without expending the daily power first.