You invoke an ancient prayer that unleashes your deity's ire upon an enemy that has just attacked you.

Encounter   ✦     Divine, Implement
Immediate Reaction      Ranged 20

Trigger: A creature within range attacks you

Target: The attacking creature

Attack: Charisma + 2 vs. Fortitude

Hit: 4d10 + Charisma modifier damage, and the target is weakened until the end of your next turn.

Published in Player's Handbook, page(s) 99.