D&Dtools1

Benefit

You can spend a rebuke undead attempt as a full-round action to channel your deity's displeasure at a
single living creature within 30 feet. That creature takes 3d6 points of nonlethal damage and is sickened for 1 round. A successful Fortitude save (DC 10 + one-half your level + your Cha modifier) negates the damage, but not the sickening effect.