Sengir Autocrat

Enchant Wall Enchanted Wall can attack as though it didn't have defender.

Flying, vigilance

Vigilance

Destroy all lands.

Flying

Untapped creatures you control get +0/+2.

Lands you control are Plains. Nonland permanents you control are white. The same is true for spells you control and nonland cards you own that aren't on the battlefield. You may spend white mana as though it were mana of any color. You may spend other mana only as though it were colorless mana.

1: The next time a black source of your choice would deal damage to you this turn, prevent that damage.