Warborn - The Tower Series, Book 9 - Seth Ring

Thorn was all set to finally climb the tower, only to stumble upon a mysterious new enemy who appears to break the rules as easily as he does. There is no question that the Herald of Terminus, a madman bent on ending all existence, must be stopped, but Thorn’s first order of business is finding his way out of the Abyssal Lands without unleashing a universe ending plague.