The Thirteenth Doctor, Crystalline Crawler, Gravecrawler, and Altar of Dementia

Prerequisites

• The Thirteenth Doctor on the battlefield
• Crystalline Crawler on the battlefield
• Gravecrawler on the battlefield
• Altar of Dementia on the battlefield
• available

Steps

1. Activate Altar of Dementia by sacrificing Gravecrawler, causing target player to mill cards equal to Gravecrawler's power
2. Cast Gravecrawler from your graveyard by paying
3. The Thirteenth Doctor's first ability triggers, putting a +1/+1 counter on Crystalline Crawler
4. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite storm count