The person is at Hogwarts, but the system is in Middle-earth

In a bizarre twist of fate, a student at Hogwarts School of Witchcraft and Wizardry discovers they have awakened a Middle-earth survival system. However, this system is malfunctioning, convinced that its user is actually in the realm of Middle-earth from J.R.R. Tolkien's Lord of the Rings. As the years pass, the Dark Lord Voldemort launches a devastating attack on Hogwarts with his army of Death Eaters. In a shocking turn of events, a figure emerges, wielding a powerful sword and channeling the spirit of a legendary hero. With a fierce cry, this warrior strikes down the Dark Lord, silencing his evil incantation and sending a bold message: they will not be called a wizard, but the Sword Saint of Middle-earth, a champion forged in the fires of a different world.