Saffi Eriksdotter, Spawning Pit, and Metamorphosis Fanatic

Prerequisites

• Saffi Eriksdotter on the battlefield
• Spawning Pit on the battlefield
• Metamorphosis Fanatic on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Metamorphosis Fanatic Activate Spawning Pit by sacrificing Metamorphosis Fanatic When Metamorphosis Fanatic dies, Saffi triggers, returning Metamorphosis Fanatic from your graveyard to the battlefield
2. When Metamorphosis Fanatic enters, it triggers, returning Saffi from your graveyard to the battlefield
3. Resolve the Spawning Pit ability
4. Repeat

Results

• Infinite charge counters on a permanent
• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers