Wingrattle Scarecrow, Yahenni, Undying Partisan, and Mm'menon, Uthros Exile

Prerequisites

• Wingrattle Scarecrow on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Mm'menon, Uthros Exile on the battlefield

Steps

1. Activate Yahenni by sacrificing Wingrattle Scarecrow When Wingrattle Scarecrow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
2. When Wingrattle Scarecrow enters, Mm'menon triggers, putting a +1/+1 counter on Wingrattle Scarecrow Resolve the Yahenni ability
3. Repeat

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers