From libris mortis p. 80 Ghostly Arm: This gray, incorporeal arm can’t be used to manipulate solid objects. However, the grafted creature can use the ghostly arm to deliver an incorporeal touch attack that deals 1d6 points of damage, the equivalent of a ghost’s corrupting touch attack. Treat the arm as a secondary weapon, but because it is incorporeal the arm has no Strength score and therefore gains no bonus or penalty on damage rolls from the user’s Strength. Graft Flesh, ethereal jaunt; Price 6,000 gp.