Peregrine Drake, Cavern Harpy, and Mirror Room // Fractured Realm

Prerequisites

• Peregrine Drake in hand
• Cavern Harpy in hand
• Mirror Room // Fractured Realm on the battlefield
• at most available

Steps

1. Activate up to five lands by tapping them, adding at least
2. Cast Peregrine Drake by paying its mana cost
3. When Peregrine Drake enters, it triggers twice
4. Resolve the first trigger, untapping five lands
5. Holding priority, activate up to five lands by tapping them, adding at least
6. Resolve the second Peregrine Drake trigger, untapping five lands
7. Cast Cavern Harpy by paying its mana cost
8. When Cavern Harpy enters, it triggers twice, returning it and Peregrine Drake from the battlefield to your hand
9. Repeat

Results

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