Stalwart Successor, Carrion Feeder, and Lingering Tormentor

Prerequisites

• Stalwart Successor on the battlefield
• Carrion Feeder on the battlefield
• Lingering Tormentor on the battlefield

Steps

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