Slifer the Sky Dragon

Flying, indestructible
As an additional cost to cast Slifer the Sky
Dragon, sacrifice three creatures. When you cast
this card, it cannot be countered or negated.
Slifer the Sky Dragon gets +1/+1 for every card
in your hand.
Whenever your opponent casts a creature, it gets
-2/-0. If this would cause it to have zero Power,
destroy it.