I have read alot on this forum about people putting down the Casket of Souls. I am here to champion it. At best it will win the game on its own (especially against lower Ld armies). At medium it will take out one think a turn which will help you (like a war machine or a fast Cav. unit). At worst it makes your opponent save 2-3 dispel dice per turn and/or scrolls, which allows your move important raising and movement incantations to go through and makes him cast at -1 and causes terror. I always use one with a basic Liche Priest on it (never put your Hierophant on it) and people crap themselves when they see it. The only major drawback is that is takes up a rare slot, but I can live with only one catapult.