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The Fast Travel Room is accessed via a portal that appears once Syväolento is killed. It is made up solely of Dense Rock and Extremely Dense Rock. The room contains 6 portals, each one sending the player to various places around the world.
The room itself is located to the east of the Dragoncave, but the portals will vanish if the room is accessed before Syväolento has been beaten. However once properly unlocked, they will be permanently open for all future runs.