How can you create a combo with Wake the Dead, Eternal Witness, Peregrine Drake, Carrion Feeder?
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[START OF COMBO]This combo can be formed with Wake the Dead, Eternal Witness, Peregrine Drake, Carrion Feeder

Color identity: BGU
Mana cost: 
Steps:
  1. During an opponent's combat step, activate up to five lands you control by tapping them, adding at least {3}{B}{B}.
  2. Cast Wake the Dead by paying {2}{B}{B}, returning Eternal Witness and Peregrine Drake from your graveyard to the battlefield.
  3. Peregrine Drake and Eternal Witness enter the battlefield, triggering their abilities.
  4. Resolve the Peregrine Drake trigger, untapping up to five lands you control.
  5. Resolve the Eternal Witness trigger, returning Wake the Dead from your graveyard to your hand.
  6. Activate Carrion Feeder twice by sacrificing Peregrine Drake and Eternal Witness, putting two +1/+1 counters on Carrion Feeder.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Carrion Feeder
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mana lands you control can produce
  - Infinite sacrifice triggers
  - Infinite untap of lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Wake the Dead must be in your hand
  - Eternal Witness must be in the graveyard
  - Peregrine Drake must be in the graveyard
  - Carrion Feeder must be on the battlefield
  - You control up to five lands that can tap to produce at least {3}{B}{B}.
[END OF COMBO PREREQUISITES]
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