Judgment of Frost: Frost Bound Duology: Book 1 (Frostbound Duology)

A pacifist never intends to enter the slave-fighting arena.

Avner has never shed blood—and never understood why his glows gold. But when his brother is taken by a rival chief obsessed with an ancient prophecy, Avner makes an unthinkable choice: he takes his brother’s place in the arena.
In the frozen ring, his golden blood doesn’t just make him a target—it makes him a prize.

Now, under the watch of a violent spy with shattered memories, Avner must survive a world built to break him—all while clinging to an oath that may be his undoing.
Outside the arena, a deadly frost spreads, and the scattered tribes of Avner’s homeland must be reunited to stop it. Caught in the middle is his master’s unhinged sister, a zealot devoted to a forgotten god—and determined to stop her brother’s rise to power.

Betrayal. Unwanted alliances. As the world unravels, Avner’s greatest fight may be holding on to who he is in a world demanding he become something else.