Sorcery, 2BBB (5)
Rare
Choose one — You draw five cards and you lose 5 life; or put an X/X black Demon creature token with flying onto the battlefield, where X is the number of cards in your hand as the token enters the battlefield.
Entwine {4} (Choose both if you pay the entwine cost.)
Illus. Kev Walker

10/4/2004: The power/toughness of the token is set when this spell resolves.
12/1/2004: The power and toughness of the Demon token are set when Promise of Power resolves. They're unaffected if the number of cards in your hand changes later.
12/1/2004: If you pay the entwine cost, you draw five cards, then lose five life, then put the Demon token onto the battlefield. The five cards you draw count toward the Demon's power and toughness.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern