Orthion, Hero of Lavabrink, and Gray Merchant of Asphodel

Prerequisites

• Orthion, Hero of Lavabrink on the battlefield
• Gray Merchant of Asphodel on the battlefield
• Orthion does not have summoning sickness
• available

Steps

1. Activate Orthion's second ability by paying and tapping it, creating five token copies of Gray Merchant of Asphodel
2. Each Gray Merchant of Asphodel enters the battlefield, triggering their abilities
3. Resolve the first trigger, causing each opponent to lose life equal to your devotion to black, and causing you to gain that much life
4. Repeat step 3 for each remaining trigger

Results

• Near-infinite lifegain
• Near-infinite lifeloss