Exalted Retribution

You land a mighty blow, and the symbol of your deity appears above your enemy’s head as a glowing red rune that only you can see, flashing brightly to warn you whenever he’s about to attack. The next time you hit a creature with a weapon attack before this spell ends, you deal an extra 8D10 radiant damage and Until the end of the encounter, the target provokes an opportunity attack from you when it attacks. You gain a +2 bonus to the opportunity attack roll and deal an extra dice of damage.