Donal, Herald of Wings | Cloudstone Curio | Peregrine Drake

Cards

Peregrine Drake in hand.
Donal and
Cloudstone Curio on the battlefield.
You control up to five lands that can tap to produce at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
You have not copied a spell with
Donal this turn.
({4} magic symbol) ({U} magic symbol) available.

Cast
Peregrine Drake by paying ({4} magic symbol) ({U} magic symbol) .
Donal triggers, creating a copy of the
Peregrine Drake spell that is a 1/1 Spirit in addition to its other types.
The copy of
Peregrine Drake enters the battlefield, triggering itself and
Cloudstone Curio.
Resolve the
Peregrine Drake trigger, untapping up to five lands that can tap to produce at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Resolve the
Cloudstone Curio trigger, returning
Donal from the battlefield to your hand.
Activate five lands by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Resolve the original
Peregrine Drake spell from step 1.
Peregrine Drake enters the battlefield, triggering itself and
Cloudstone Curio.
Resolve the
Peregrine Drake trigger, untapping up to five lands that can tap to produce ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Resolve the
Cloudstone Curio trigger, choosing not to return anything to your hand.
Cast
Donal by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Donal enters the battlefield, triggering
Cloudstone Curio, returning
Peregrine Drake from the battlefield to your hand.
Activate five lands by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Repeat.