The creator of the aboleths, known as Piscaethces the Blood Queen, lives deep in a hidden bog-cavern in Minauros. She is a lethargic power despite her desire to guide her followers to domination of all other creatures. She is, however, known to send her occasional offspring to Prime Material Plane, where they often become among the most powerful of savants.
This was an interesting project, considering that Tiamat is included in the FR Powers & Pantheons book. However, as that was specifically to the FR/Unther Human version rather than the generic/multisphere Draconic version, it wasn’t possible to do a straight cut and paste. Also, this features my version of draconic specialty priests, which I think work a LOT better than the version in Cult of the Dragon. Also, watch for me slip in some hints at what I’m going to do with my revised real-world pantheons. :D