Fain, the Broker, Thornbite Staff, Crystalline Crawler, and Bloodsoaked Champion

Prerequisites

• Fain, the Broker on the battlefield
• Thornbite Staff on the battlefield
• Crystalline Crawler on the battlefield
• Bloodsoaked Champion on the battlefield

Steps

1. Activate Fain's first ability by tapping it and sacrificing Bloodsoaked Champion
2. Bloodsoaked Champion dies, triggering Fain, untapping Fain
3. Resolve the Fain ability from step 1, putting two +1/+1 counters on Crystalline Crawler
4. Activate Crystalline Crawler's first ability twice by removing two counters from it, adding
5. Activate Bloodsoaked Champion by paying , returning it from your graveyard to the battlefield tapped
6. Repeat

Results

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