Infused with primal energy, you draw on the power of your opponent's attack to spur your will to live.

Daily   ✦     Primal
Immediate Interrupt      Personal

Trigger: You are hit by an attack

Effect: Until the end of your next turn, you gain resistance to all damage equal to one-half your level + your Constitution modifier.

Published in Player's Handbook 2, page(s) 58.