Stalwart Successor, Scuzzback Marauders, and Carrion Feeder

Prerequisites

• Stalwart Successor on the battlefield
• Scuzzback Marauders on the battlefield
• Carrion Feeder on the battlefield

Steps

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