Thermopod, Heartmender, and Hardened Academic

Prerequisites

• Thermopod on the battlefield
• Heartmender on the battlefield
• Hardened Academic on the battlefield

Steps

1. Activate Thermopod by sacrificing Heartmender
2. When Heartmender dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Hardened Academic triggers, putting a +1/+1 counter on Heartmender
4. Repeat

Results

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