Saffi Eriksdotter, Jackdaw Savior, and Yahenni, Undying Partisan

Prerequisites

• Saffi Eriksdotter on the battlefield
• Jackdaw Savior on the battlefield
• Yahenni, Undying Partisan on the battlefield
• undefined

Steps

1. Activate Saffi by sacrificing it, targeting Jackdaw Savior
2. Activate Yahenni 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 Yahenni ability
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers