Shriveling Touch( Ghostwalk, p. 38)
Choose one physical ability score (Strength, Dexterity, or Constitution). When you touch a living creature or a ghost, you can cause permanent drain to that score.
You can make a touch attack that deals 1d4 points of permanent ability drain to the selected ability score of a living creature or ghost. When you are manifested fully or attacking incorporeal opponents, you add your Strength modifier to attack rolls. When you are incorporeal, you add your Dexterity modifier to attack rolls. If the attack scores a critical hit, the draining is doubled (ghosts are not subject to critical hits). Only one kind of damage or effect from the path of the corrupter applies from each attack. You may use this attack once per day per character level.
You do not have to use this ability when you touch another creature, and creatures that touch you are not subject to this ability drain.
You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a different ability score.
A ghost's touch attack normally deals no damage.