Overwrite the Multiverse
{4}{B}{B}Sorcery
Exile all creatures. Empower Jace X, where X is the number of creatures exiled this way. (Put that many loyalty counters on a Jace token you control. If you don't control one, first create a blue Jace planeswalker token with "[−1]: Surveil 1" and "[−3]: Draw a card.")