Catwoman

When the only remaining players are you and
your Burglars, you all win the game. If you die,
you and your Burglars lose.
Whenever you would cause an opponent to lose
the game, instead reveal Catwoman. That player becomes a Burglar, and joins your two headed
giant team. Remove all commander damage and
poison counters from that player. You gain 9 life,
and you and that player each create 5 treasure
tokens. Flip Catwoman face down again.