How this card works is very simple and very strong effect. You simply loose the targeting ability. You just play every spell just as it was an aoe (the a.i. will randomly choose a legit target for you, like jogg), and every minion can hit ANY other minion or hero on the board.
Basically this is a stall card on steroid just to buy you time in extreme situations.
Just think about it, you are board cleared and your opponent has 5 strong minions. You play this card and suddenly you force your opponent not to attack or take the risk to let his minion kill eachothers or himself. There are so few counter to this card (flamestrike, dragon potion)
I think we'll see much more use of this card than you could imagine....