Phantom Hourglass Trading Sequence

From Zelda Wiki.org

The Phantom Hourglass Trading Sequence is one of the many trading sidequests that have been put into the Legend Of Zelda Games, in which you can get a scroll teaching the Great Spin Attack.

To begin the sidequest, you must board the Traveler's Ship belonging to the Man of Smiles in the Northeast corner of the Great Sea. Once you defeat all the monsters who have taken his ship, he will offer to reward you with two sets of treasures, both of which include the Hero's New Clothes.

Next, take the clothes to The Hero, who will give you a Kaleidoscope in return. Take the kaleidoscope to the Ho Ho Tribe, who will trade a Guard Notebook for it. Take the notebook to Nyave, who will give you a Wood Heart for it after you rescue him from monsters.

If you have completed the Mermaid Sidequest, the Wood Heart can be given to the Old Wayfarer, who will let you have the treasure left at his home. This treasure is the Swordsman's Scroll.