I am a magically engineered golem that was made over 1000 years ago, I became the ultimate magic engineer and over the 1000 years I have existed I've studied all forms of magic from enchantments, runes, potions, seals, spells, carpentry, blacksmithing and many others to mix with my magical engineering to create better and stronger things.

But when I was only 40 or 50 years old, the four founders of Hogwarts approach me. They were looking for help to teach the students from all four houses, thus I became their first teacher.

In exchange for my help they would help me improve my skills in other magic arts besides my magical engineering for the first few hundred years even long after all founders were dead I would teach classes and upgrade the school well learning all the newest things about the magical world through the students, the new books in the library and the occasional conference I would to go to instead of the headmaster but after about 600 years the students stop applying to my class so I spend my time studying magic of all kinds while upgrading or repairing Hogwarts.

About, the eight hundred year mark it seems I was forgotten by pretty much everyone at Hogwarts heck even ministry of magic seems to have forgotten I was a teacher at Hogwarts but didn't seem to stop them from sending orders for custom items like the Time Turner's.

Since I was all but forgotten, I decide to work on my ultimate magical engineering feat to date that I was going to call it "Room of Requirement". A room that only appeared when needed and could become anything you need it to, no matter what.

I estimated that would take at least 100 years to finish but when it's done if I ever had a student again I would have the ultimate classroom and there was always a chance I could get a student since my name and class were still on the registered list of options to take at Hogwarts.

But during the time I was making the room the request from the ministry stop coming, I can only assume they need no more Time Turner's or they just forgotten where to send the request letters and my class was to remove from the registered list of options to take at Hogwarts not that I knew that.

It wasn't until after the final battle against Voldemort that people realized I was here because several people saw me taking down one death eater after another while constantly getting hit by the killing curse and not even flinching after all I am a 1000+ year old an immortal golem but while everyone was wondering who or what I was well partying, I was busy repairing the school. Over, 80% of the defenses I design for school had were destroyed in the attack not to mention several walls knocked down and no one at the school other than the house-elves ever help me repair this stuff, so I was busy repairing everything.

They eventually found out two months later who I was, and that I was the one who repaired the school after asking Hermione Granger to write the new Hogwarts history and she asked for all the old copies of Hogwarts history and saw my portrait in all the ones from the first 600 years telling them about how I was the first teacher recruited by the founders and that I was an immortal golem that was not only made with magical engineering but taught it which surprised everyone considering as it is considered by the magical community as a lost art. Of course when the teachers and the new minister of magic Kingsley Shacklebolt found out about this they all went to see me. They thought there would only be an abandoned office with maybe some book on magical engineering but find me upgrading one of the magical armors in the castle because with all the damage done during the attack showed that I needed to make a better defense system for the school and let's just say I was thrilled to have a camera handy.

After talking and questions which were many but most of them came from Hermione Granger saying having the perspective of someone who had been at Hogwarts since near the beginning would help in writing the Hogwarts history and just between you and me she came back many times to ask me about the history of Hogwarts also my magical engineering. They asked if I'd be willing to take the position of headmaster until someone more suitable is found, since none of the other teachers have been willing to in the last two months. Of course I said yes, but only until someone more suitable is ready to do it.

One of the first things I did was give the caretaker Argus Filch a glove which allow him to use a wand which caused him to have undying loyalty to me but also made most of the students hate me for a while anyway's, it also caused hundreds of letters from parents of children who couldn't use magic weather because there were squibs or because one of their parents was a Muggle of course my gloves could help them so long as they had magic heritage which caused hundreds of late entries which unfortunately I could only allow entries for years four and under to Hogwarts even then I had to bring in assistant teachers to help the students catch up with the other students but because of the influx of magic users the ministry had a bunch a crashed course lessons made to help people who just got the ability to use magic thanks to my gloves.

Thankfully, I found someone who could take over as headmaster since apparently 90% of the students that use my gloves had decided to take my class whether out of hero worship or actual curiosity of what I do I don't know but I was happy to see my classroom packed like at the beginning of Hogwarts and my custom constructs requests coming in by the hundreds again truly myself and the magical engineering are remembered again and not considered a forgotten art anymore and if I have anything to say about it never will be again because so long as I stand I will make sure Hogwarts survives and that it teaches magical engineering because I'm its first golem and I'm sure I'll be its last no matter what.