Mortuary, Gray Merchant of Asphodel, Blasting Station, and Gwenom, Remorseless

Prerequisites

• Mortuary on the battlefield
• Gray Merchant of Asphodel in hand or in the library
• Blasting Station on the battlefield
• Gwenom, Remorseless on the battlefield

Steps

1. Cast Gray Merchant either from your hand by paying or from the top of your library by paying 5 life
2. When Gray Merchant enters, it and Blasting Station trigger
3. Resolve the Gray Merchant trigger, causing each opponent to lose life equal to your devotion to black and causing you to gain life equal to the life lost this way
4. Resolve the Blasting Station trigger, untapping it
5. Activate Blasting Station by tapping it and sacrificing Gray Merchant
6. When Gray Merchant dies, Mortuary triggers, putting Gray Merchant from your graveyard onto the top of your library
7. Resolve the Blasting Station ability
8. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage
• Infinite lifegain triggers
• Infinite lifegain
• Infinite lifeloss