Peregrine Drake, Meticulous Excavation, and Panharmonicon

Prerequisites

• Peregrine Drake in hand
• Meticulous Excavation on the battlefield
• Panharmonicon on the battlefield
• You control up to five lands that can tap to produce at least

Steps

1. Activate up to five lands you control by tapping them, adding at least
2. Cast Peregrine Drake by paying
3. Peregrine Drake enters the battlefield, triggering its ability twice
4. Resolve the first trigger, untapping up to five lands
5. Activate up to five lands you control by tapping them, adding at least
6. Resolve the second Peregrine Drake trigger, untapping up to five lands
7. Activate Meticulous Excavation by paying , returning Peregrine Drake from the battlefield to your hand
8. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite mana lands you control can produce
• Infinite storm count
• Infinite untap of lands you control