Enchantment — Aura, B (1)
Common
Enchant creature you control
Enchanted creature gets +3/+3.
At the beginning of your upkeep, sacrifice a creature.
"Morality is just shorthand for the constraints of being powerless."
—Ob Nixilis
Illus. Igor Kieryluk

6/15/2010: When Demonic Appetite's triggered ability resolves, you may sacrifice the creature enchanted by Demonic Appetite. If you control no other creatures, you'll have to sacrifice that one.
6/15/2010: If another player gains control of either Demonic Appetite or the enchanted creature (but not both), Demonic Appetite will be enchanting an illegal permanent. The Aura will be put into its owner's graveyard as a state-based action.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern