Nigon is the second underground race.

no, it won't be overpowered.

oh, you're pushing me with formulas again.
come on, you'll come up with another formula for a NON-EXISTENT castle.
magic doesn't matter. let's think about abilities first.

and for the Emperor's sake, stop writing "illiDiT" so awkwardly, it's "illiTiD".
unless it's a completely different creature that happens to have a very similar name.