Shiryou Majutsu no Yougisha

Luna is an apprentice magician who is taken in by Khan, an aging magician who is only interested in his magical studies. She strives to prove herself by mastering magic, hoping to earn his approval. After the king's death sparks widespread rebellion, the kingdom faces collapse. Suddenly, an army of the undead crushes the rebel forces. The use of forbidden necromancy raises questions about who is behind the mysterious attacks.