Beseech Patron

Paragon Tier
Prerequisite: 11th level, warlock, Warlock’s Curse
Benefit: When you spend an action point to take an extra action and use an arcane power, you gain the benefit of your pact boon as if an enemy under your Warlock’s Curse had dropped to 0 hit points or fewer.

Published in Dragon Magazine 381, page(s) 53.