Graveshifter

T: Add C. W/B, T: Add WW, WB, or BB.

Destroy target creature or enchantment.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Each player puts a vow counter on a creature they control and sacrifices the rest. Each of those creatures can't attack you or planeswalkers you control for as long as it has a vow counter on it.

Whenever a Knight you control attacks, each opponent loses 1 life and you gain 1 life. 6WB, Sacrifice this enchantment: Return all Knight creature cards from your graveyard to the battlefield.

Whenever this creature or another nontoken Phyrexian you control enters, create X 3/3 colorless Phyrexian Golem artifact creature tokens, where X is the number of opponents you have. Golems you control have indestructible.

Artifact creatures you control have flying. At the beginning of combat on your turn, you may have target noncreature artifact you control become a 0/0 artifact creature. If you do, put four +1/+1 counters on it.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.) Flying