The sunbearer trials / Aiden Thomas.

Only the most powerful and honorable semidioses get chosen. I'm just a Jade. I'm not a real hero. As each new decade begins, the Sun's power must be replenished so that Sol can keep traveling along the sky and keep the chaotic Obsidian gods at bay. Sol selects ten of the most worthy semidioses to compete in the Sunbearer Trials. The winner carries light and life to all the temples of Reino del Sol, but the loser has the greatest honor of all - they will be sacrificed to Sol, their body melted down to refuel the Sun Stones, protecting the world for another ten years. Teo, a seventeen-year-old Jade semidiós and the trans son of the goddess of birds, isn't worried about the Trials - at least, not for himself. His best friend, Niya is a Gold semidiós and a shoo-in for the Trials, and while he trusts her abilities, the odds of becoming the sacrifice is one-in-ten.