Mikaeus, the Unhallowed, Atog, and Chainbreaker

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Atog on the battlefield
• Chainbreaker on the battlefield

Steps

1. Activate Atog 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 Atog ability Repeat

Results

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