Mikaeus, the Unhallowed, Ravenous Intruder, and Chainbreaker

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Ravenous Intruder on the battlefield
• Chainbreaker on the battlefield

Steps

1. Activate Ravenous Intruder by sacrificing Chainbreaker
2. When Chainbreaker 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 Ravenous Intruder ability Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinitely large creature until end of turn