Mikaeus, the Unhallowed, Evereth, Viceroy of Plunder, and Carnifex Demon

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Evereth, Viceroy of Plunder on the battlefield
• Carnifex Demon on the battlefield

Steps

1. Activate Evereth 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 Evereth ability Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite damage