The pain you endure increases the strength of your later attack.

Daily   ✦     Primal
Immediate Reaction      Personal

Trigger: An enemy's attack hits you and damages you

Effect: You take extra damage from the triggering attack equal to one-half your level. The next time you attack any enemy marked by you before the end of the encounter, you gain a bonus equal to your Constitution modifier to the attack roll and the damage roll.

Published in Primal Power, page(s) 96.