Sorcerer Utility 2Absorb Storm
You channel the power of the storm to bolster yourself against an attack and divert the power to your next assault.
Immediate Reaction Personal
Trigger: You take cold, lightning, or thunder damage
Effect: Until the end of the encounter, you gain resistance to the triggering damage type equal to your Charisma modifier. Your next attack before the end of the encounter that deals the triggering damage type gains a +2 bonus to the attack roll.
Published in Arcane Power, page(s) 30.