Liege of the Pit
Time Spiral — rare
Creature — Demon
Liege of the Pit rulings:
2006-09-25: You can’t sacrifice Liege of the Pit to its own ability. You can sacrifice one Liege of the Pit to another Liege of the Pit.
2006-09-25: If you have another creature on the battlefield when the ability resolves, you must sacrifice it. You can’t choose to be dealt 7 damage instead.