Sometimes in a world of war, the best weapon you can use is a monster. Monsters are often treated as untamable beasts and freaks of supernaturals, like Thorax before reformation for example.
All he's ever known is abuse, negligence, pain... and even death. Everycreature treats him as a monster and a worthless lizard who means nothing to the world. Through this abuse, the world is punished, and his progression is incomplete.
Only one dragon and one changeling can change his perspective of the life the world offers him now.