Avatar of Justice (3.5e Feat)
From D&D Wiki
Avatar of Justice [Exalted, Epic]
You have become a beacon of justice on battle. Using your profound divide power you are able to punish those evil ones before you to new heights. Your justice also resounds in the area judging those around you.
Prerequisite: Acolyte of Justice, Initiate of Justice, Master of Justice, Weapon Focus (with deity’s favored weapon), Must be of good alignment, 21st level or higher.
Benefit: After a successful smite attack, all evil aligned creatures within a 20 feet radius around the original target suffer 4d6 sonic damage and are stunned for 1 round. A successful Reflex save (DC 10 +1/2 character level + Cha modifier) halves the damage and negates the stun effect. Also, any undead or evil outsider within 20 feet of the original target of also suffer +1d6 holy damage/two character levels, with no save. A Paladin with this feat adds and extra 1d6 holy damage/two character levels, with no save against undead and evil outsiders within 20 feet of the original target.