Elemental power surrounds you and lashes out at those who attack you.

Daily   ✦     Arcane ; Varies
Minor Action      Personal

Effect: Until the end of the encounter, when any enemy hits or misses you with an attack against AC, that enemy takes 1d10 + your Strength modifier damage. The damage is the type you resist with your Dragon Soul class feature.

Published in Player's Handbook 2, page(s) 150.