Stalwart Successor, Carrion Feeder, and Rendclaw Trow

Prerequisites

• Stalwart Successor on the battlefield
• Carrion Feeder on the battlefield
• Rendclaw Trow on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing Rendclaw Trow When Rendclaw Trow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
2. When Rendclaw Trow enters, Stalwart Successor triggers, putting a +1/+1 counter on Rendclaw Trow Resolve the Carrion Feeder ability
3. Repeat

Results

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