Might of Lichdom

(You may cast a legendary sorcery only if you control
a legendary creature or planeswalker.)
Put a hexproof counter and a phylactery counter
on target nonland permanent. For the rest of the
game, as long as you control a permanent with a
phylactery counter on it, you can't lose the game.
Your life total becomes 0. For the rest of the
game, you can't gain life. Exile Might of
Lichdom.