Maybe the description is a bit confusing... The staff is an ancient and powerful artifact... in it lies the whole power of the Undead hordes, and was meant only for the Lich Queen. No one knows who made the orb which powers the staff or what it represents...some say that it is the remaining claw of the Dark lord still holding one of his power globes. It is only known that it controls living and spiritual beings to serve his purpose, so the Lich Queen was controlled by it as well. The staff was broken in the great war against Demons, the Lich Queen was destroyed, the Undead were extinguished and the Necropolis fell in ruin... You can see in the advanced version, the Asmodian as the new Lich king , summoning spirits to carry him and behind him you can see the rebuilding of Necropolis... Hope that things are much clearer now.