(Eberron Campaign Setting variant, p. 105)
You may use a touch of decay once per day. Your touch of decay is a supernatural ability that causes putrescence in organic matter and weakens inorganic matter. You must succeed on a melee touch attack to affect a creature (using the rules for touch spells). If you touch a living creature including constructs with the living subtype, you deal 1d4 points of Constitution damage. If you touch an undead creature, an object, or a construct without the living construct subtype, you deal 2d6 points of damage +1 point per cleric level.