Saffi Eriksdotter, Lurrus of the Dream-Den, Earthcraft, and Yahenni, Undying Partisan

Prerequisites

• Saffi Eriksdotter on the battlefield
• Lurrus of the Dream-Den on the battlefield
• Earthcraft on the battlefield
• Yahenni, Undying Partisan on the battlefield
• You control at least one basic Forest
• You control at least one basic Plains

Steps

1. Activate a basic Forest and Plains by tapping them, adding
2. Activate Earthcraft twice by tapping Lurrus and Saffi, untapping the basic Forest and Plains
3. Activate Saffi by sacrificing it, targeting Lurrus
4. Activate Yahenni by sacrificing Lurrus
5. When Lurrus dies, Saffi triggers, returning Lurrus from your graveyard to the battlefield
6. Resolve the Yahenni ability, giving it indestructible until end of turn
7. Cast Saffi from your graveyard by paying
8. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count