Future expansions.

Fortress (Castle of Lizards and other swamp dwellers)
It's easy. The location is easy to find. The main thing is to define a single concept.

In my opinion, it's a bit difficult because the concept, at least partially, has shifted to the Nagas – lizards in the swamp have turned into snakes in the jungle (that's what I think).

There is clearly a lack of the Sylan faction – some kind of "Free Cities of the East." That is, someone connected with the element of air.

Otherwise, I get exactly 10 factions: 8 for the dragons + 2 – Wizards and Barbarians, who are without dragons.