Broken Knight of Insanity (FGO male reader insert)

Bio and explanation

Hello people who are reading this book. If you haven't noticed, I've probably lost my mind by making this book. I have little to no knowledge of Fgo yet here I am writing a fic about it! But this idea is stuck in my head and I really wanted to write about it. This book is going to be slow because of some of the past information. But I have some neat ideas for this and I hope you enjoy it once it gets into gear. This chapter will be a place holder of sorts until I get enough info to start writing for it. I'll most likely make another chapter that will be the game stats of the character. Anyways, once more I hope you enjoy.
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(Before i start the bio, I'm going to show two versions of Y/n. One is him before the tragedy, and the other is after it.)

When Y/n was a boy, he grew up alongside a girl named Artoria. They were close friends and were inseparable. When she was given Excalibur and became king, you still went with her and became one of her soon to be many knights. A few years had passed, The round table had done many a great things together, and you all were great friends. But like most good things, it had to come to an end. Someone wanted to break Artoria, to kill her and take the sword for themselves. But they themselves knew better than to attack her directly, and where's the entertainment in sending an army? Why not break Artoria's will in the process. And that's where Y/n comes in. With a black magic, the person turned Y/n into a puppet, no longer in control but forced to watch. They used Y/n to try and kill Artoria and his friends, and watching himself nearly kill his closest friends broke him. Artoria branded Y/n a traitor and he was know an enemy. They all thought Y/n had betrayed them. If only they knew. After a time, with nothing changing to Artoria or her knights, but with the possibility of Y/n still being useful, the person sealed him away, leaving him alone in an endless darkness. This only deteriorated Y/n's mind further. His mind would fully shatter, once he was free. The black magic used to seal him away had weakened, allowing for him to escape. Not without consequences, showing a different set of armor and weapon, along with black spikes growing or protruding from his left arm. But at the time, none of that mattered. What mattered was finding his king and friends, and try to explain what happened. But when he came to Camelot, from afar, he saw only ruins. And when he entered, his mind finally shattered. 100 years too late. And there, in his sadness and grief, something happened. Someone, or something, took pity upon him, and gave him the means to bring them back. A Holy Grail. From there and forward, things become fuzzy. Camelot becomes covered in black spires and spikes, parts in ruin while other parts are in perfect condition. Things start to appear that shouldn't be there, monsters roam around, and objects that belonged to those he knew suddenly appear before him. In his madness, he wanted to do only one thing. Bring them back. And so began, the tale of The Broken Knight of Insanity.

Name: Sir Y/n L/n
Looks: whatever you want them to be
Weapon and armor:

(obviously ignore the sword and shield, and change the colors to what you like)

Y/n after the tragedy

Armor and weapon:

(Ignore the swords, mask instead of helmet, claw instead of left gauntlet, and imagine black spikes emerging from his left arm, along with two horn like protrusions from the left side of his head, and with the spear imagine black spikes in random locations. Sorry for the big explanation but mental images are important to me.)

Magical abilities: The black spikes across Y/n's left arm are not just for show, neither is the clawed hand. Though his left arm appears to be dead, it will snap to life whenever he uses it. The abilities are as such:

Claw hand

Sword like protrusions from hand

Hand grows black spikes and turns into bow like shape, can use it as such

Makeshift shield, he feels nothing in his left arm

Can create and utilize black spikes in most of his attacks

(Alright that should be all. Like I said this is going to be a place holder until I feel comfortable enough to write about fgo. But I hope you enjoy everything that's here, and what this could become)