The portcullis of Zaks' castle
The gate of Zaks' cloud castle is shut behind a portcullis.
Nudge 1Where to look
Portcullises are wound up and down with a winch, and the winch is missing its handle.
What you needOther problems to solve first
Solve these first (each opens its own page, no answers on the way):
Show the solutionThe whole answer, with a video
Drop Zaks' portcullis winch handle (below decks on Blackheart's ship) at the winch beside the gate: the portcullis winds down and the castle's door opens. B at the door goes in.