Omnipotence

Hexproof, Indestructible
You may look at the top card of your library at
any time.
You may cast instant and sorcery spells from the
top of your library.
You may pay {0} rather than pay the mana cost of instant and sorcery spells you cast.
{p/u}: Mill the top card of your library.
If Omnipotence leaves the battlefield, you lose the
game.