Crystalline Crawler, Light of Promise, Emiel the Blessed, and Gray Merchant of Asphodel

Prerequisites

• Crystalline Crawler on the battlefield
• Light of Promise on the battlefield
• Emiel the Blessed on the battlefield
• Gray Merchant of Asphodel on the battlefield
• Light of Promise attached to Crystalline Crawler
• Your devotion to black is at least four, or you have at least two opponents
• available

Steps

1. Activate Emiel by paying , blinking Gray Merchant
2. Gray Merchant enters the battlefield, causing each opponent to lose life equal to your devotion to black, and causing you to gain life equal to the amount of life lost this way
3. Crystalline Crawler triggers, putting at least four +1/+1 counters on itself
4. Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding
5. Repeat

Results

• Infinite +1/+1 counters on Crystalline Crawler
• Infinite blinking
• Infinite colored mana
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB