This is a popular way of travel for those who have mastered keyblade transformations. These portals are open for use of any students or teachers who have a small vehicle and the proper armor to stay alive in space, the armor can be found in a small room near the entrance. These portals don't always lead to outside worlds however. Some lead to the sleeping worlds, which is a great place to practice flowmotion or to learn about dream eaters. These portals do not require any transportation of special armor, simply dive into the world you wish to visit through the corresponding portal.