I don't get this card.
So I pay 8
for a 50% chance of something that benefits me happening? If I am unlucky (the other 50%), I have just wasted 8
and one card just so that I could kill/debuff my
OWN creatures?!
A card that can potentially hurt you, must have a bigger chance of benefiting you. Otherwise the risk/reward just is not worth it.
It would make more sense if the negative effects affected your
opponent, not you. But in that case it might need a nerf.
Lastly.. I don't see that image as a spell. Looks way too much like a permanent to me.