@AntrozT6 love it!!! though I think Mantax should look more like his G1 self also they could have an army of their followers who were also sent to the pit and mutated as well as sea rahi (an easter egg from lego atlantis) and What sea animal is Nocturn supposed to resemble?
and I'm back with some more characters (when I make size comparisons it is post mutation):
Gadunka: he was Carapars' brother and second in command was sent to the pit and mutated into an angler fish like monster about Carapars' size. he was cold and merciless he became good friends of Takadox because they both were great tacticians and enjoyed manipulation. he is deadly strong with his ax.
Kiina: the only offspring of Takadox and Pelagia. she was at her fathers side when he was overthrown and sent to the pit with him. she mutated into a viperfish like form. her legs merged together into a snake like tail (no fins though I will build her tail with mixel joints and spikes). she was 15 when they were imprisoned. she"s smart,cunning,and cruel like her father and very skilled with her sword. she also shares Ehleks' interest in poison.
Hydraxon: a captain under Pridak, he was mutated into a snapping turtle beast twice Carapars' size with a tough spiked shell and huge claws. he was a kind merciful captain though he lost his mind till he was not much more than an animal during the mutation process.