Ryder is not undead, yes he looks that part and that but not turnly undead

http://www.furaffinity.net/view/18213798/

The reason he looks like this is when using a mix of each of his element powers to make a high risky high reward type style
Having Stronger powers for attacks and defense however lowing his physical body skin and scales, as well being to only dragon besides Acker to use genetic mods for is inner body