You breathe out a shield of energy in response to an attack, and it continues to protect you.

Daily   ✦     Arcane
Immediate Interrupt      Personal

Trigger: You are hit by an attack

Effect: Until the end of the encounter, you gain a +2 power bonus to all defenses, and the resistance granted by your Dragon Soul also applies to another damage type of your choice (acid, cold, fire, lightning, poison, or thunder).

Published in Arcane Power, page(s) 44.