Dismiss into Dream, and Deathbringer Thoctar

Prerequisites

• Dismiss into Dream on the battlefield
• Deathbringer Thoctar on the battlefield

Steps

1. Remve a +1/+1 counter from Deathbringer Thoctar, targeting a creature an opponent controls
2. That creature triggers, causing its controller to sacrifice it
3. Deathbringer Thoctar triggers, putting a +1/+1 counter on itself
4. Repeat

Results

• Lock
• Destroy each creature that enters the battlefield under an opponent's control
• Destroy all creatures opponents control