Unit — Demon • Cost: 6 • ATK: 7 • HP: 7
Upkeep: Sacrifice a unit. If you do, deal 1 damage to each opposing unit, hero, and building.
Black • Demonology Tech II
You can sacrifice him for his own effect. If you control no other units, you MUST sacrifice him since the effect isn't optional. You'll still deal the damage. — Sirlin, 03/19/16