so in Coruscould there is a giant grand library. the library is spiral shaped and goes downwards getting smaller and smaller. so each level has monsters and such in it, but each level has tons of doors leading off of the main spiral, these doors lead to the random dungones, they get more complicated and harder the lower down you go in the library. this library is a magic library that has everything in it, just they are through doors and you ahve to explore it