Gray Merchant of Asphodel in hand or in your library (on top of your library).
All other permanents on the battlefield.
Easy Prerequisites
Your life total is at least 6 if Gray Merchant is on the top of your library, or you have available otherwise.
Notable Prerequisites
Gwenom has attacked this turn.
Steps
Cast Gray Merchant either from your hand by paying or from the top of your library by paying 5 life.
When Gray Merchant enters, it and
Blasting Station trigger.
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.
Resolve the
Blasting Station trigger, untapping it.
Activate
Blasting Station by tapping it and sacrificing Gray Merchant.
When Gray Merchant dies,
Mortuary triggers, putting Gray Merchant from your graveyard onto the top of your library.
Resolve the
Blasting Station ability.
Repeat.
Results
Infinite creature LTB.
Infinite creature ETB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Infinite damage.
Infinite lifegain triggers.
Infinite lifegain.
Infinite lifeloss.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
1
2
3
4
5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.