Carrion Feeder, and Tromell, Seymour's Butler

Prerequisites

• Carrion Feeder on the battlefield
• Tromell, Seymour's Butler on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Tromell 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