You enter a cozy room, befitted with a warm fireplace. Upon closer scrutiny, the room presents some peculiarities: the window seems to look out into a void, the ceiling is fretted with celestial bodies, while a wizard conjures a tiny pegasus in mid air. You politely greet the mage, reach for the door, and find it is locked.
I gather you're seeking an audience with Salin. He is at the top of the tower. To get there you must obtain access to the nexus. I can grant you that, but I ask a favor. Touch the blue flame on the table. It will teleport you to an unexplored zone. Theoretically, you should be able to return here. I think. I just need to know what is on the other side.
Since you have no choice, you accept the mage's request and interact with the flame.