Types:
Summon - Infernal Denizen
Card Text:
During your upkeep, sacrifice two swamps. If you cannot, tap Infernal Denizen, and target opponent may gain control of target creature of his or her choice you control. The opponent loses control of that creature if Infernal Denizen leaves play.
ocT: Gain control of target creature. Lose control of that creature if Infernal Denizen leaves play.