How can you create a combo with Yarok, the Desecrated, Soul Foundry, Corridor Monitor, Peregrine Drake?
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[START OF COMBO]This combo can be formed with Yarok, the Desecrated, Soul Foundry, Corridor Monitor, Peregrine Drake

Color identity: BGU
Mana cost: {7}
Steps:
  1. Cast Soul Foundry by paying {4}.
  2. Soul Foundry enters the battlefield, triggering its imprint ability twice, exiling Peregrine Drake and Corridor Monitor.
  3. Activate up to five lands you control by tapping them, adding at least {4}.
  4. Activate Soul Foundry by paying {7} and tapping it, creating a token copy of Peregrine Drake and Corridor Monitor.
  5. The Peregrine Drake and Corridor Monitor tokens enter the battlefield, triggering their abilities twice.
  6. Resolve both Corridor Monitor triggers, untapping Soul Foundry.
  7. Resolve the first Peregrine Drake trigger, untapping up to five lands you control.
  8. Activate up to five lands you control by tapping them, adding at least {4}.
  9. Resolve the second Peregrine Drake trigger, untapping up to five lands you control.
  10. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite mana permanents you control can produce
  - Infinite untap of permanents you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be in your hand
  - Panharmonicon on the battlefield.You control up to five lands that can tap to produce at least {4}.
[END OF COMBO PREREQUISITES]
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