Saffi Eriksdotter, General Leo Cristophe, and Thermopod

Prerequisites

• Saffi Eriksdotter on the battlefield
• General Leo Cristophe on the battlefield
• Thermopod on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting General Leo Cristophe
2. Activate Thermopod by sacrificing General Leo Cristophe
3. When General Leo Cristophe dies, Saffi triggers, returning General Leo Cristophe from your graveyard to the battlefield
4. When General Leo Cristophe enters the battlefield, it triggers, returning Saffi from your graveyard to the battlefield
5. Repeat

Results

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