Mysterious Tower

Mysterious Tower is a world that is the home of Master Yen Sid. Although considered to be a part of Twilight Town in Kingdom Hearts II, it is its own world.

Locations
After getting off the train, you start off at the Tower Entrance. Once you walk through the door, you're at the Staircase. Once walking up the stairs, you enter a portal, leading you to the Wayward Stairs. After walking for some time, you enter a door marked with a star, leading you to the Star Chamber. Going through the room you enter the Wayward Stairs again, and this time, a door marked with a moon leads you to the Moon Chamber. The room leads you to another set of Wyward Stairs, except this time the stairs are golden. It leads you to The Sorcerer's Chamber. In this chamber, there is a door leading to the Wardrobe Room, where you can edit your Finale Mode forms.

Story
All three of the players (Kairi, Sora, and Riku) enter the tower together and go through its different staircases and chambers. At the end of the tower, at Yen Sid's chamber, Yen Sid explains the concept of Vents, them being quick and easy pathways used by Heartless to travel to different worlds. He also explains a new threat, the Lightfeeders, who are consuming the light of worlds. He gives the three the task to seal all Vents and eliminate any Lightfeeders they may encounter. Then, he tells the three about their means of transportation, each having their own unique way of traveling. Afterward, he tells them in the Wardrobe Room there Daisy Duck tells them about Finale Mode, and how their appearances change. She can help change its colour scheme if the player wishes.