Bhaal, Lord of Murder, and Carrion Feeder

Prerequisites

• Bhaal, Lord of Murder on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing a persist creature that does not have a -1/-1 counter on it
2. When the creature dies, its persist ability and Bhaal trigger
3. Resolve the Bhaal trigger, putting a +1/+1 counter on the remaining persist creature
4. Resolve the sacrificed creature's persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it
5. Resolve the Carrion Feeder ability from step 1
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on Carrion Feeder