Blightbeetle, Iroh, Tea Master, and Hammerhead, Maggia Boss

Prerequisites

• Blightbeetle on the battlefield
• Iroh, Tea Master on the battlefield
• Hammerhead, Maggia Boss on the battlefield

Steps

1. Use Iroh to give Blightbeetle to an opponent Activate Hammerhead 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 Hammerhead ability
4. Repeat from step 2

Results

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