Sidisi, Undead Vizier, Rooftop Storm, Sedraxis Alchemist, Gray Merchant of Asphodel, Rot Hulk, and Carrion Feeder

Prerequisites

• Sidisi, Undead Vizier in hand
• Rooftop Storm on the battlefield
• Sedraxis Alchemist in the library
• Gray Merchant of Asphodel in the library
• Rot Hulk in the library
• Carrion Feeder on the battlefield or in the graveyard
• You have at least two opponents

Steps

1. Cast Sidisi by paying
2. Sidisi's exploit ability triggers, sacrificing itself
3. Sidisi triggers, searching your library for Rot Hulk, putting it in your hand and shuffling your library
4. Cast Rot Hulk by paying
5. Rot Hulk enters the battlefield, returning Sidisi and Carrion Feeder, if applicable, from your graveyard to the battlefield
6. Sidisi's exploit ability triggers, sacrificing itself
7. Sidisi triggers, searching your library for Sedraxis Alchemist, putting it in your hand and shuffling your library
8. Cast Sedraxis Alchemist by paying
9. Sedraxis Alchemist enters the battlefield, returning Rot Hulk from the battlefield to your hand
10. Activate Carrion Feeder by sacrificing Sedraxis Alchemist, putting a +1/+1 counter on Carrion Feeder
11. Cast Rot Hulk by paying
12. Rot Hulk enters the battlefield, returning Sidisi and Sedraxis Alchemist from your graveyard to the battlefield
13. Sidisi and Sedraxis Alchemist enter the battlefield, triggering Sidisi's exploit ability and Sedraxis Alchemist
14. Resolve the Sidisi exploit trigger, sacrificing itself
15. Sidisi triggers, searching your library for Gray Merchant of Asphodel, putting it in your hand and shuffling your library
16. Resolve the Sedraxis Alchemist trigger, returning Rot Hulk from the battlefield to your hand
17. Cast Gray Merchant of Asphodel by paying
18. Gray Merchant of Asphodel enters the battlefield, 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
19. Activate Carrion Feeder by sacrificing Gray Merchant of Asphodel and Sedraxis Alchemist, putting two +1/+1 counters on Carrion Feeder
20. Cast Rot Hulk by paying
21. Rot Hulk enters the battlefield, returning Gray Merchant of Asphodel and Sedraxis Alchemist from your graveyard to the battlefield
22. Gray Merchant of Asphodel and Sedraxis Alchemist enter the battlefield, triggering their abilities
23. Resolve the Gray Merchant of Asphodel 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
24. Resolve the Sedraxis Alchemist trigger, returning Rot Hulk from the battlefield to your hand
25. Repeat from step 19

Results

• Each opponent loses the game
• Infinite +1/+1 counters on Carrion Feeder
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count