Mikaeus, the Unhallowed, Shilgengar, Sire of Famine, and Heirloom Auntie

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Heirloom Auntie on the battlefield

Steps

1. Activate Shilgengar by sacrificing Heirloom Auntie
2. When Heirloom Auntie 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