Deathbringer Thoctar + Death Baron
Deathbringer Thoctar must be on the battlefield. Death Baron must be on the battlefield. Deathbringer Thoctar has at least one +1/+1 counter on it.
- Activate Deathbringer Thoctar by removing a +1/+1 counter from it, dealing 1 damage to any creature an opponent controls.
- The creature dies as a state-based action due to Deathbringer Thoctar's deathtouch.
- Deathbringer Thoctar triggers, putting a +1/+1 counter on itself.
- Repeat as desired.
- You may also repeat this combo whenever a creature enters the battlefield under an opponent's control.
Destroy all creatures opponents control. Destroy any creature that enters the battlefield under an opponent's control.