Blightbeetle, Spawning Pit, and Iroh, Tea Master

Prerequisites

• Blightbeetle on the battlefield
• Spawning Pit on the battlefield
• Iroh, Tea Master on the battlefield

Steps

1. Use Iroh to give Blightbeetle to an opponent Activate Spawning Pit by sacrificing the undying creature
2. When the undying creature dies, its undying ability triggers, returning itself from your graveyard to the battlefield without a +1/+1 counter on it due to Blightbeetle
3. Resolve the Spawning Pit ability
4. Repeat from step 2

Results

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