Peregrine Drake, Shrieking Drake, and Panharmonicon

Prerequisites

• Peregrine Drake in hand
• Shrieking Drake in hand
• Panharmonicon on the battlefield
• You control lands that can produce at least
• available

Steps

1. Cast Peregrine Drake by paying
2. When Peregrine Drake enters the battlefield, it triggers itself twice due to Panharmonicon
3. Resolve one Peregrine Drake trigger, untapping five lands
4. Activate those lands by tapping them to add at least
5. Resolve the remaining Peregrine Drake trigger, untapping five lands
6. Activate those lands by tapping them to add at least
7. Cast Shrieking Drake by paying
8. When Shrieking Drake enters the battlefield, it triggers itself twice due to Panharmonicon, returning itself and Peregrine Drake from the battlefield to your hand
9. Repeat
10. If you can produce at least one additional mana in step 4, this combo produces infinite mana

Results

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