Ghost Touch

Ghost Touch (DC 24)
Moderate conjuration; CL 9th; Price +1 bonus
Description
A ghost touch weapon deals damage normally against incorporeal creatures. The weapon can be picked up and moved by an incorporeal creature at any time. A manifesting ghost can wield the weapon against corporeal foes. A ghost touch weapon counts as both corporeal or incorporeal.
Construction
Craft Magic Arms and Armor, 1st level transmutation spell