Yarok, the Desecrated, Soul Foundry, Corridor Monitor, and Great Whale

Prerequisites

• Yarok, the Desecrated in hand
• Soul Foundry in hand
• Corridor Monitor in hand
• Great Whale in hand
• Panharmonicon on the battlefield
• You control up to seven lands that can tap to produce at least
• available

Steps

1. Cast Soul Foundry by paying
2. Soul Foundry enters the battlefield, triggering its imprint ability twice, exiling Great Whale and Corridor Monitor
3. Activate up to seven lands you control by tapping them, adding at least
4. Activate Soul Foundry by paying and tapping it, creating a token copy of Great Whale and Corridor Monitor
5. The Great Whale and Corridor Monitor tokens enter the battlefield, triggering their abilities twice
6. Resolve both Corridor Monitor triggers, untapping Soul Foundry
7. Resolve the first Great Whale trigger, untapping up to seven lands you control
8. Activate up to seven lands you control by tapping them, adding at least
9. Resolve the second Great Whale trigger, untapping up to seven lands you control
10. Repeat from step 3

Results

• Infinite creature tokens
• Infinite ETB
• Infinite mana permanents you control can produce
• Infinite untap of permanents you control