Obsidian Threads (The Lost Shards) (Volume 2) 1st edition

Rho has awakened. Its acolytes will tear worlds apart to release their deity from its prison. Any hope of Rho's defeat lies with two people lost in a strange universe. Kaden and Aren must learn to harness all their unique gifts if they are to rival the god of darkness reborn. They will not fight alone. A brilliant geneticist, a furry dwaro, two less than friendly elves, dragons, and a spunky red-haired computer stand with them. But if Kaden and Aren fail to reach their full potential, all of reality will be devoured until nothing remains but Rho.