Thermopod, and Tromell, Seymour's Butler

Prerequisites

• Thermopod on the battlefield
• Tromell, Seymour's Butler on the battlefield

Steps

1. Activate Thermopod by sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Tromell
3. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite red mana
• Infinite creature sacrifice triggers