Mikaeus, the Unhallowed, Spawning Pit, and Slumbering Walker

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Spawning Pit on the battlefield
• Slumbering Walker on the battlefield

Steps

1. Activate Spawning Pit by sacrificing Slumbering Walker
2. When Slumbering Walker 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 Spawning Pit ability Repeat

Results

• Infinite charge counters on a permanent
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers