He has shapeshifting powers. As his health lowers down a quarter he will change shape. First he looks like your character only made of water and ice.
Then he will change into a hydra that will has wings of ice and attacks by breathing high-pressured water and ice shards.
And finally he will turn into a gigantic water behemoth that looks like biollante and a hydra combined and attacks with water tendrils, an energy beam that is colored purple, all his 2nd forms powers and his most powerful attack is a blast of rainbow color energy from his main head and all different colors from his other head.
- His name is a reference to the that he is made of water and that he is a hydra.