Leviathan

Leviathan
A dragon that once used to be an ancient water dragon, he was captured by the Tua and experimented on until there could be no definable difference between a real dragon and a mechanical one. Leviathan was the first villain that the team had ever fought. Leviathan is very powerful, and nigh-indestructible. Leviathan's laser breath and his razor sharp metal claws and teeth make him a dominating opponent. Add in the fact that he has an advanced targeting system, his attacks are close to very accurate.