I Have a Hogwarts

Brian, who traveled to a fantasy world, spent eighteen years building a low-end version of Hogwarts. From this moment on, his destiny changes. As long as he completes the tasks given by the system, he can obtain various spells and talents, and the low-end version of Hogwarts can also be upgraded. Therefore, Brian appointed himself the principal of Hogwarts and began to recruit students and part-time professors of various subjects to teach magic...