Belixia, Mistress of the Coven

Threshold - {2}{b/g}{g/w}{w/b} {t}: Look at the top five cards of your library. Reveal a creature card from among them and put it onto the battlefield under your control and put the rest into your graveyard. Exile it at the beginning of your next end step. Sacrifice it instead of it's one of the
Witches of the Coven.

At the beginning of your upkeep, if you control thirteen witches of the Coven, you win the game.

Belixia, Mistress of the Coven can't attack or block unless you control 3 or