Dragon Hunters (The Chronicles of the Exile, Bk. 2)

Once a year the fabled Dragon Gate is raised to let a sea dragon pass into the Sabian Sea. There, it will be hunted by the Storm Lords, a fellowship of powerful water-mages who rule an empire called the Storm Isles.

Emira Imerle Polivar is coming to the end of her tenure as leader of the Storm Lords, but she has no intention of standing down graciously. As part of her plot to hold on to power, she instructs an order of priests known as the Chameleons to sabotage the Dragon Gate. There's just one problem: that will require them to infiltrate an impregnable citadel that houses the gate's mechanism - a feat that has never been accomplished before.

But Imerle is not the only one intent on destroying the Storm Lord dynasty. As the Storm Lords assemble in answer to a mysterious summons, they become the targets of assassins working for an unknown enemy. And when Imerle sets her scheme in motion, that enemy uses the ensuing chaos to play its hand.