Gambler's Mastery

Hexproof
You can't lose the game.
You can't concede the game.
Whenever you gain life, take that many cards
from the ante at random and add them to
your hand.
Whenever you lose life, for each 1 life you lost,
add a permanent you control or a card from
your hand or graveyard to the ante.
When Gambler's Mastery leaves the battlefield,
you lose the game.