Overseer of the Damned, Dictate of Erebos, and Viscera Seer

Prerequisites

• Overseer of the Damned on the battlefield
• Dictate of Erebos on the battlefield
• Viscera Seer on the battlefield

Steps

1. Activate Viscera Seer by sacrificing any other creature
2. Dictate of Erebos triggers, causing each opponent to sacrifice a creature
3. Overseer of the Damned triggers for each nontoken creature an opponent sacrificed, creating a 2/2 Zombie creature token for each trigger
4. Resolve the Viscera Seer trigger, causing you to scry 1
5. Repeat
6. You may also repeat this loop any time a nontoken creature enters the battlefield under the control of an opponent who controls no token creatures

Results

• Lock
• Each opponent sacrifices all creatures they control
• Each opponent sacrifices any creature that enters under their control