Saffi Eriksdotter, General Leo Cristophe, and Umbral Collar Zealot

Prerequisites

• Saffi Eriksdotter on the battlefield
• General Leo Cristophe on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting General Leo Cristophe
2. Activate Umbral Collar Zealot 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. Resolve the Umbral Collar Zealot ability
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite surveil 1