Mikaeus, the Unhallowed, Ashnod's Altar, and Lesser Masticore

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Ashnod's Altar on the battlefield
• Lesser Masticore on the battlefield

Steps

1. Sacrifice the Lesser Masticore to Ashnod's Altar to add
2. Lesser Masticore's persist and undying trigger
3. Resolve the persist trigger returning Lesser Masticore to the battlefield with a -1/-1 counter
4. Sacrifice the Lesser Masticore to Ashnod's Altar to add
5. Lesser Masticore's persist and undying trigger
6. Resolve the undying trigger returning Lesser Masticore to the battlefield with a +1/+1 counter
7. Repeat

Results

• Infinite colorless mana
• Infinite damage to creatures
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers