Zerberos

Vigilance Suspend 2—1 life (Rather than cast this card from your hand, you may pay 1 life and exile it with two time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.) {2}{Pb}: Transform Zerberos. Activate only as a sorcery. ({Pb} can be paid with either {b} or 3 life){/fontsize-24}