Soul Foundry + Corridor Monitor + Gilded Lotus + Panharmonicon

Soul Foundry
Corridor Monitor
Gilded Lotus
Panharmonicon

Requires
Soul Foundry must be on the battlefield. Corridor Monitor must be in exile (exiled by Soul Foundry). Gilded Lotus must be on the battlefield. Panharmonicon must be on the battlefield.
Steps
  1. Activate Gilded Lotus by tapping it, adding three mana of any color.
  2. Activate Soul Foundry by paying 2 and tapping it, creating a token copy of Corridor Monitor.
  3. When the Corridor Monitor token enters the battlefield, it triggers twice, untapping Soul Foundry and Gilded Lotus.
  4. Repeat.
Results
Infinite colored mana. Infinite creature tokens. Infinite ETB. Infinite mana artifacts you control can produce. Infinite mana creatures you control can produce. Infinite untap of artifacts you control. Infinite untap of creatures you control.

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Creatures
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Grand Architect
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Platinum Angel
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Treasure Mage
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Trophy Mage
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Trinket Mage
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Instants
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Sorceries
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Utility Artifacts
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Utility Lands
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Lands
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