Kheru Lich Lord

At the beginning of your upkeep, you may pay{2}{b}. If you do, return a creature card at random
from your graveyard to the battlefield. It gains
flying, trample, and haste. Exile that card at the
beginning of your next end step. If it would leave
the battlefield, exile it instead of putting it
anywhere else.
-(Brandon Sanderson Cube Legendary)-