How can you create a combo with Rot Hulk, Phyrexian Delver, Carrion Feeder, Gray Merchant of Asphodel?
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[START OF COMBO]This combo can be formed with Rot Hulk, Phyrexian Delver, Carrion Feeder, Gray Merchant of Asphodel

Color identity: B
Mana cost: {5}{B}{B}
Steps:
  1. Cast Rot Hulk by paying {5}{B}{B}.
  2. Rot Hulk enters the battlefield, triggering its ability.
  3. Holding priority, activate Carrion Feeder by sacrificing Rot Hulk, putting a +1/+1 counter on Carrion Feeder.
  4. Resolve Rot Hulk's trigger, returning Phyrexian Delver and Gray Merchant of Asphodel from your graveyard to the battlefield.
  5. Gray Merchant of Asphodel and Phyrexian Delver enter the battlefield, triggering their abilities.
  6. Holding priority, activate Carrion Feeder by sacrificing Gray Merchant of Asphodel and Phyrexian Delver, putting two +1/+1 counters on Carrion Feeder.
  7. 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.
  8. Resolve the Phyrexian Delver trigger, returning Rot Hulk from your graveyard to the battlefield and causing yourself to lose 7 life.
  9. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Each opponent loses the game
  - Infinite +1/+1 counters on Carrion Feeder
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite lifeloss
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Rot Hulk must be in your hand
  - Phyrexian Delver must be in the graveyard
  - Carrion Feeder must be on the battlefield
  - Gray Merchant of Asphodel must be in the graveyard
  - You have at least two opponents.
[END OF COMBO PREREQUISITES]
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