Fey Revel Glamor

Paragon Tier
Prerequisite: 11th level, warlock, Warlock’s Curse class feature, fey pact
Benefit: Whenever you deal Warlock’s Curse damage to a target and do so with a warlock daily attack power, the target is slowed (save ends). If the power already subjects the target to a slowing effect that a save can end, the target is instead immobilized (save ends).

Published in Dragon Magazine 384, page(s) 31.