How can you create a combo with Pitiless Plunderer, Eternal Witness, Mitotic Slime, Nethroi, Apex of Death, Carrion Feeder?
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[START OF COMBO]This combo can be formed with Pitiless Plunderer, Eternal Witness, Mitotic Slime, Nethroi, Apex of Death, Carrion Feeder

Color identity: WBG
Mana cost: {4}{G/W}{B}{B} plus enough mana to pay for commander tax, if applicable
Steps:
  1. Cast Nethroi either from your hand or from the command zone for its mutate cost by paying {4}{G/W}{B}{B} plus commander tax, if applicable, putting it on top of a non-Human creature you control.
  2. When Nethroi enters the battlefield, it triggers.
  3. Holding priority, activate Carrion Feeder by sacrificing Nethroi.
  4. When Nethroi dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
  5. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
  6. Resolve the Nethroi trigger from step 2, returning Eternal Witness and Mitotic Slime from your graveyard to the battlefield.
  7. When Eternal Witness enters the battlefield, it triggers, returning Nethroi from your graveyard to your hand.
  8. Activate Carrion Feeder twice by sacrificing Eternal Witness and Mitotic Slime.
  9. When Eternal Witness and Mitotic Slime die, Pitiless Plunderer triggers twice and Mitotic Slime triggers once.
  10. Resolve both Pitiless Plunderer triggers, creating two Treasure artifact tokens.
  11. Resolve the Mitotic Slime trigger, creating two 2/2 Ooze creature tokens.
  12. Resolve both Carrion Feeder abilities, putting two +1/+1 counters on it.
  13. Activate Carrion Feeder twice by sacrificing two Oozes.
  14. When the Oozes die, they each trigger and Pitiless Plunderer triggers twice.
  15. Resolve both Pitiless Plunderer triggers, creating two Treasure artifact tokens.
  16. Resolve both Ooze triggers, creating four 1/1 Ooze creature tokens.
  17. Resolve both Carrion Feeder abilities, putting two +1/+1 counters on it.
  18. Activate Carrion Feeder twice by sacrificing two Oozes.
  19. When the Oozes die, Pitiless Plunderer triggers twice, creating two Treasure artifact tokens.
  20. Resolve both Carrion Feeder abilities, putting two +1/+1 counters on it.
  21. Activate the seven Treasures by tapping and sacrificing them, adding {4}{G/W}{B}{B}.
  22. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Carrion Feeder
  - Infinite colored mana
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Pitiless Plunderer must be on the battlefield
  - Eternal Witness must be in the graveyard
  - Mitotic Slime must be in the graveyard
  - Nethroi, Apex of Death must be in your hand or in the command zone
  - Carrion Feeder must be on the battlefield
  - You control at least one non-Human creature.
[END OF COMBO PREREQUISITES]
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