Shilgengar, Sire of Famine, Wingrattle Scarecrow, and Thran Vigil

Prerequisites

• Shilgengar, Sire of Famine on the battlefield
• Wingrattle Scarecrow on the battlefield
• Thran Vigil on the battlefield

Steps

1. Activate Shilgengar by sacrificing Wingrattle Scarecrow
2. When Wingrattle Scarecrow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Thran Vigil triggers, putting a +1/+1 counter on Wingrattle Scarecrow
4. Resolve the Shilgengar ability
5. Repeat

Results

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