The Tower was here before any people of Aetherion. From the outside it is a mountain of pale stone that disappears into the clouds. Inside, each floor is far larger than the Tower looks: it has its own sky, rivers, forests, ruins and creatures found nowhere else.
The floors are linked by stairways closed by seals. No seal opens to the strength of a single person. Ever since the first expeditions, people have known that the Tower was made to be climbed by many, together.