The League Slayer Bat

Begin the game with this card revealed.
You can only control one creature at any
given time, but they have flash.
Only creatures you control have indestructible,
double-strike, hexproof, protection from
creatures and instants, and has "Enrage-
when this creature is deal damage, deal that
much damage to all other creatures."
You aren't eliminated so long as you have
one creature under your control.