D&D4 Wiki
Armor of winter's grasp
warlock attack 1

Target: each creature within the burst

Attack: Charisma vs. Fortitude

Hit: "2d6 + Charisma modifier cold damage, and the target is slowed (save ends)."

Miss: "Half damage."

Effect: "You gain a +2 power bonus to AC and Fortitude until the end of the encounter."[HotFK:208]

Armor of winter's grasp is a daily power available to warlocks at 1st level.