As your attack hits home, your become wrapped in blinding light, hindering a foe's ability to strike you.

Encounter   ✦     Divine, Radiant, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Wisdom vs. AC

Hit: 2[W] + Wisdom modifier radiant damage, and the target takes a -4 penalty to attack rolls against you until the end of your next turn.

Published in Player's Handbook 2, page(s) 39.