Ok, a couple of problems with this Divine, mainly your character's usage of ice abilities. I know ice is frozen water, but I'm keeping the two seperate. It just seems a bit much if one scion can use two elements.

Second, the prophecy bit just bugs me a little. For one part, the Dark Scions aren't necassarily evil. For the most part, they're fighting because they felt the Scions of Light and the gods betrayed them. And after the fighting that your character's done against them, they'd be less likely to accept you on their side, and more likely to straight up murder you. Why would your character even switch sides after killing the Dark Ice Scion anyway?