Mikaeus, the Unhallowed, Shilgengar, Sire of Famine, and Carnifex Demon

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Carnifex Demon on the battlefield

Steps

1. Activate Shilgengar by sacrificing Carnifex Demon
2. When Carnifex Demon dies, its undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to its replacement effect
3. Resolve the Shilgengar ability Repeat

Results

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