Bhaal, Lord of Murder, Persistent Specimen, Crystalline Crawler, and Ashnod's Altar

Prerequisites

• Bhaal, Lord of Murder on the battlefield
• Persistent Specimen on the battlefield
• Crystalline Crawler on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Persistent Specimen, adding
2. When Persistent Specimen dies, Bhaal triggers, putting a +1/+1 counter on Crystalline Crawler and goading it
3. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding
4. Activate Persistent Specimen by paying , returning it from your graveyard to the battlefield tapped
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers