You touch your holy symbol to an enemy, branding it with the painfully radiant symbol of your deity and causing it to take damage from its own attacks.

Encounter   ✦     Divine, Implement, Radiant
Standard Action      Melee touch

Target: One creature

Attack: Charisma vs. Will

Hit: 4d8 + Charisma modifier radiant damage. If the target makes an attack on its next turn, it takes half damage from its own attack whether it hits or misses.

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