Michael Rosen

First strike, hexproof
When Michael Rosen enters the battlefield, flip
two coins. If both are heads, each player discards
X cards, sacrifices half X creatures, rounded up,
and loses X life. If both are tails, each player draws
X cards, returns half X creature cards from their
graveyard to the battlefield under their control,
rounded up, and gains X life. If there is one heads
and one tails, each opponent discards X cards, sacrifices
half X creatures, rounded up, and loses X life.