Wingrattle Scarecrow, Carrion Feeder, and Serra Redeemer

Prerequisites

• Wingrattle Scarecrow on the battlefield
• Carrion Feeder on the battlefield
• Serra Redeemer on the battlefield

Steps

1. Activate Carrion Feeder 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, Serra Redeemer triggers, putting a +1/+1 counter on Wingrattle Scarecrow Resolve the Carrion Feeder 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