Saffi Eriksdotter, Hero of the Dunes, and Yahenni, Undying Partisan

Prerequisites

• Saffi Eriksdotter on the battlefield
• Hero of the Dunes in hand
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Hero of the Dunes Activate Yahenni by sacrificing Hero of the Dunes When Hero of the Dunes dies, Saffi triggers, returning Hero of the Dunes from your graveyard to the battlefield
2. When Hero of the Dunes enters, it triggers, returning Saffi from your graveyard to the battlefield
3. Resolve the Yahenni ability
4. Repeat

Results

• Infinite creature LTB
• Infinite creature ETB
• Infinite death triggers