The Thirteenth Doctor, Squee, the Immortal, Crystalline Crawler, Phyrexian Altar, and Primal Vigor

Prerequisites

• The Thirteenth Doctor on the battlefield
• Squee, the Immortal on the battlefield
• Crystalline Crawler on the battlefield
• Phyrexian Altar on the battlefield
• Primal Vigor on the battlefield
• available

Steps

1. Activate Phyrexian Altar by sacrificing Squee, adding
2. Cast Squee from your graveyard by paying
3. The Thirteenth Doctor's first ability triggers, putting two +1/+1 counters on Crystalline Crawler
4. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count