The discord of gods / Jenn Lyons.

Relos Var's plans to enslave the universe near completion, and all that stands in his way is the demon Xaltorath. Or so he believes, for Kihrin could still alter the course of this war. Yet Kihrin's playing the most dangerous of games as he appears to assume his prophesied role: as destroyer, sun water, a mindless, remorseless plague upon the land. All this, while still protecting those he loves. But even as Kihrin seeks an eleventh-hour reprieve, his body threatens to betray him. He's grappling with the after-effects of a corrupted magical ritual. Worse, he's now bound to the avatar of a star - a form that's becoming catastrophically unstable. All of which means he's running out of time. After all, some stars fade... but others explode.