Vesselless

[She’s heiress to the throne. The throne her father stole from him.] Nizzara has always been able to perceive spirits better than the average caster. When she enters a deadly tournament to end her betrothal, she's determined to win without succumbing to the addictive spirit magic she channels or taking a life in the duel ring. Finding herself outmatched, Nizzara must face her fear of power and team up with Dagen—an enemy who is half-ghost and all charm—to survive the tournament. Dagen, the last King of Zarr, was killed by Nizzara’s father ten years ago. Now a half-ghost—able to phase between his human and spirit form—he is stuck in another realm, hunting wretched souls. When his keeper offers him a chance to reclaim his freedom in exchange for Nizzara’s soul, Dagen takes the deal. There’s only one catch: she must freely give it to him by the tournament’s end or his own soul is forfeit.