Wingrattle Scarecrow, Bloodflow Connoisseur, and Mm'menon, Uthros Exile

Prerequisites

• Wingrattle Scarecrow on the battlefield
• Bloodflow Connoisseur on the battlefield
• Mm'menon, Uthros Exile on the battlefield

Steps

1. Activate Bloodflow Connoisseur 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 Bloodflow Connoisseur ability
3. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers