The Black Cobra of Mar'a Thul (The Jinni and the Isekai, #2‪)‬

With his new companion, Jessamine, Shiro finds himself in Darshuun, the shining jewel of the Abassir Empire on a quest to find a way to sever Jessamine’s bond with her master Darius. With her full powers, surely they can work together to discover the mystery behind who isekaid Shiro into these lands, but all goes awry when the samurai is confronted by the Black Cobra of Mar’a Thul, a top-tier adventurer working for the vizier Faridoon al Rashik.