Maskacre

{t}Sacrifice a permanent: You gain life equal
to the sacrificed permanent's mana cost.
{w}{b}{r} Pay 10 life: Flip a coin until you lose a
flip. If you lose a flip sacrifice a permanent at
random. If you win a flip, each opponent
sacrifices a permanent at random
When Maskacre dies, each player sacrifices a permanent at random
As long as I get a good laugh, I could care less what happens