SCP 738 The Devil's Deal

If you paid life to cast SCP 738, it enters tapped
with X stun counters on it, where X is the
number of opponents you have.
{p/b}, {t}: Sacrifice a creature. Draw 3 cards.
{p/b}, {t}: Pay X life. Add X mana in any
combination of colors. This causes mana burn.
{p/b}, {t}: Discard 3 cards. Gain 5 life.
Any player may activate SCP 738's abilities, but
only as a sorcery.
Untap SCP 738 during each players untap step.