Peregrine Drake enters the battlefield, triggering itself and Minion Reflector.
Resolve Peregrine Drake's ability, untapping up to five lands.
Activate those lands by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) .
Resolve Minion Reflector's ability, paying ({2} magic symbol) to create a token copy of Peregrine Drake with haste that will be sacrificed at end of turn.
The token copy of Peregrine Drake enters the battlefield, triggering itself, untapping up to five lands.
Activate those lands by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) .
Cast Shrieking Drake by paying ({U} magic symbol) .
Shrieking Drake enters the battlefield, triggering itself and Minion Reflector.
Resolve Minion Reflector's ability, paying ({2} magic symbol) to create a token copy of Shrieking Drake with haste that will be sacrificed at end of turn.
The token copy of Shrieking Drake enters the battlefield, triggering itself, returning the nontoken Shrieking Drake from the battlefield to your hand.
Resolve the nontoken Shrieking Drake's ability, returning the nontoken Peregrine Drake from the battlefield to your hand.
Repeat.
If you control a land that can tap to produce at least ({2} magic symbol) , this combo produces infinite mana.