Screams from Within, Shilgengar, Sire of Famine, and Garrison Excavator

Prerequisites

• Screams from Within on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Garrison Excavator on the battlefield

Steps

1. Activate Shilgengar by sacrificing the creature that has Screams from Within attached
2. When the creature dies, Screams from Within triggers, returning it from your graveyard to the battlefield attached to another creature you control
3. Garrison Excavator triggers, creating a creature token
4. Resolve the Shilgengar ability
5. Repeat

Results

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