Saffi Eriksdotter, Jackdaw Savior, and Hammerhead, Maggia Boss

Prerequisites

• Saffi Eriksdotter on the battlefield
• Jackdaw Savior on the battlefield
• Hammerhead, Maggia Boss on the battlefield

Steps

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

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers