Inalla, Archmage Ritualist | Barrin, Master Wizard | Peregrine Drake

(and one other card)

You control up to five lands that can tap to produce at least ({4} magic symbol) ({U} magic symbol) .

Activate up to five lands by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) .
Cast
Peregrine Drake by paying ({4} magic symbol) ({U} magic symbol) .
When
Peregrine Drake enters the battlefield, it and
Inalla trigger.
Resolve the
Peregrine Drake trigger, untapping up to five lands.
Activate up to five lands by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) .
Resolve the
Inalla trigger, causing you to pay ({1} magic symbol) to create a token copy of
Peregrine Drake.
When the
Peregrine Drake token enters the battlefield, it triggers, untapping up to five lands.
Activate
Barrin by paying ({2} magic symbol) and sacrificing the
Peregrine Drake token, returning the nontoken
Peregrine Drake from the battlefield to your hand.
Repeat.