Returning to original thread topic momentarily, ethereal movement should be allowed to all undead who are naked. This will only make the movement type useful for quests and will not give any combat advantage to most players (dragons being a partial exception). Maybe wraiths should get a special "wraith touch" attack skill (melee skill which deals level dependant damage, dealing ghosthit, drain, life stealing, and depletion)? As a counterbalance undead should not be allowed to swim or fly. I don't know why, but it seems more balanced that way.