Marrow-Gnawer, and Faces of the Past

Prerequisites

• Marrow-Gnawer on the battlefield
• Faces of the Past on the battlefield

Steps

1. Activate Marrow-Gnawer by tapping it and sacrificing another Rat
2. When the Rat dies, Faces of the Past triggers, untapping all Rats
3. Resolve the Marrow-Gnawer ability, creating a 1/1 Rat creature token for each Rat you control
4. Repeat

Results

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