I always wonder what's in that tower. Prior to Sephirot, I figured each of the Eikons were stored there with the upper most floor containing something ... or someone; especially since there seems to be a potential entrance to that tower.

In fact, there's many potential dungeons in Azys Lla, but with 3.4 around the corner and the focus on Ala Mhigo, I don't think there will be much going on there anymore