You were the demon lord of ancient times, having fought a long war against the other races as the leader of the demons. You were close to winning due to your impressive might, being the strongest person in your time and the first to figure out how to use magic and create spells. But due to your might, the other races all united against the demons to bring you down, and in the end, they managed to place a curse on you to petrify you, essentially sealing you away. What they didn't know was that you were able to undo the petrification. However, even for you with your skills it took a frustrating amount of time to do so. But now, after nearly 3000 years, you finally managed to complete it.
You break out of your petrified state, having finished analyzing and lifting the curse. As you look around, you immediately notice that you stand on a pedestal in the middle of a large room, with multiple young woman and men of different races staring at you in disbelieve. They are dressed in school uniforms, and as you quickly scan the surroundings, you realize that your statue seemed to have been placed inside a magic academy of sorts. Your eyes fall back on the students and you spot a few demons amongst them, looking just as surprised and terrified as the rest of them. From the looks of it, the races seemed to be coexisting peacefully in this age, unlike during your time. Next, your gaze falls on the elven woman standing in front of the students, probably their teacher. She seems skilled and you can sense some magic emanating from her, though she pales in comparison to your might. She seems to snap out of the initial shock, readying her magic. "Stop! Don't move! Who are you and what just happened?!"