Skysworn

The fourth volume in the New York Times best-selling Cradle series!
With his duel fast approaching, Lindon is locked away in prison.

As a Blackflame, he is too dangerous to remain free. The Skysworn, protectors of the Empire, have imprisoned him to keep him under control until the day of his promised fight arrives.

When it does, he will face Jai Long.

But a new danger approaches the Empire, closer every day. A legendary creature of impossible size and an endless thirst for blood. A Dreadgod.

Only the Skysworn stand between the people of the land and total annihilation.

And Lindon may be forced to join them.
Series Description
The Cradle series is a completed 12 volume series now being published in trade paperback and trade hardcover for the first time. It is the best-selling example of the Progression Fantasy subgenre, which includes works of fantasy where the primary plot revolves around a character growing more powerful in their use of magic.
Cradle is high-stakes, fast-paced, and action-focused, with minimal time dedicated to world-building, and as such the books are lean and focused. The series is often compared to anime, with fans emphasizing the story’s specialty of loud and colorful super-powered battles along with lots of humor.