Spelljack | Chandra, Hope's Beacon | Displacer Kitten

Cards

Spelljack in hand.
Chandra and
Displacer Kitten on the battlefield.
You have an additional instant or sorcery card in hand.
You have not copied a spell using
Chandra this turn.
({3} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) plus enough mana to cast the additional instant or sorcery card available.

Cast any other instant or sorcery card from your hand by paying its mana cost.
Chandra and
Displacer Kitten triggers.
Resolve the
Displacer Kitten trigger, blinking
Chandra.
Resolve the
Chandra trigger, creating a copy of the instant or sorcery.
Holding priority, cast
Spelljack by paying ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) , targeting the instant or sorcery cast in step 1.
Chandra and
Displacer Kitten triggers.
Resolve the
Displacer Kitten trigger, blinking
Chandra.
Resolve the
Chandra trigger, creating a copy of
Spelljack that is targeting the original
Spelljack.
Resolve the copy of
Spelljack, countering the original
Spelljack and exiling it with the ability to cast it for free from exile.
Cast
Spelljack from exile without paying its mana cost, targeting the instant or sorcery cast in step 1.
Repeat from step 6.