Your devotion to black is at least four, or you have at least two opponents.
Mana Needed
({3} magic symbol) available.
Steps
Activate
Emiel by paying ({3} magic symbol) , blinking Gray Merchant.
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.
Crystalline Crawler triggers, putting at least four +1/+1 counters on itself.
Activate
Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding ({3} magic symbol) .