Saffi Eriksdotter, Karmic Guide, and Carrion Feeder

Prerequisites

• Saffi Eriksdotter on the battlefield
• Karmic Guide on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Karmic Guide
2. Activate Carrion Feeder by sacrificing Karmic Guide
3. Karmic Guide dies, triggering Saffi, returning Karmic Guide from your graveyard to the battlefield
4. When Karmic Guide enters the battlefield, it triggers, returning Saffi from your graveyard to the battlefield
5. Resolve the Carrion Feeder ability from step 2, putting a +1/+1 counter on it
6. Repeat

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers