15 Jun 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.
15 Jun 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.