Teysa, Orzhov Scion, Darkest Hour, and Viscera Seer

Prerequisites

• Teysa, Orzhov Scion on the battlefield
• Darkest Hour on the battlefield
• Viscera Seer on the battlefield

Steps

1. Activate Viscera Seer by sacrificing another creature
2. When the creature dies, Teysa triggers, creating a 1/1 Spirit creature token that is black due to Darkest Hour
3. Resolve the Viscera Seer ability
4. Repeat

Results

• Infinite creature LTB
• Infinite creature ETB
• Infinite creature sacrifice triggers
• Infinite death triggers