Saffi Eriksdotter, Jackdaw Savior, and Umbral Collar Zealot

Prerequisites

• Saffi Eriksdotter on the battlefield
• Jackdaw Savior on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Jackdaw Savior
2. Activate Umbral Collar Zealot by sacrificing Jackdaw Savior
3. When Jackdaw Savior dies, it and Saffi trigger
4. Resolve the Jackdaw Savior trigger, returning Saffi from your graveyard to the battlefield
5. Resolve the Saffi trigger, returning Jackdaw Savior from your graveyard to the battlefield
6. Resolve the Umbral Collar Zealot ability
7. Repeat

Results

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