OK, so...
Retributive Strike (Ex?): An angel of wrath may make an attack of opportunity once per round as an immediate action against a creature that damaged it with a melee attack.
Death Throes (Ex): When killed, an angel of wrath explodes in a blinding flash of holy power that deals 1d6 points of damage per Hit Die (13d6 for a typical angel of wrath, maximum 20d6) to any nongood creature within 100 feet (Reflex DC x half ). This explosion automatically destroys any weapons the angel is holding. The save DC is Constitution-based.
or...
Death Throes (Ex): When killed, an angel of wrath explodes in an arc of holy power that deals 1d6 points of damage per Hit Die (13d6 for a typical angel of wrath, maximum 20d6) to its slayer (Reflex DC x half ). This explosion automatically destroys any weapons the angel is holding. The save DC is Constitution-based.