Ivy Lane Denizen, and Carrion Feeder

Prerequisites

• Ivy Lane Denizen on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing the creature with persist
2. The persist ability triggers, returning that creature to the battlefield with a -1/-1 counter
3. Ivy Lane Denizen triggers, putting a +1/+1 counter on the persist creature
4. Resolve the ability from step 1, putting a +1/+1 counter on Carrion Feeder
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite +1/+1 counters on Carrion Feeder