Forgot to remove the word from the title XD. Now then, hope you enjoy

-3D POV-

Right now Y/N was sitting on one of the beds with Bladewolf layed down at the bottom of the bed. The girls meanwhile sat on the other 2 beds.

Blake: So that's it? You went to some cave you've been told by 2 men in your dream and came back with a cannon, an energy sword and a high-tech mechanical dog.

Y/N: A wolf actually but yes. Oh and my new eyes.

He changed his eyes into sharingan and then into eternal mangekyou. The girls were surprised, well, except Ruby because she was patting Bladewolf and looking at him to see what weapons he had. The good robo boy was loving the affection.

Weiss: What, are those eyes?

Y/N: Oh these are called the sharingan. They have pretty neat abilities like I can become invincible because all your attacks will pass through me, do an illusion on you and it can be whatever I want. I can even make black flame appear that can't be extinguished and it will burn anything and everything for 7 days and 7 nights if I won't make it dissappear.

Yang: Okay that's cool. But what kind of illusions?

Y/N: I can make you relive all your live but without your hair and for us it will be only 17 seconds while for you it will be 17 years.

Yang: *gasps and grabs her hair protectively* You monster!

Y/N: Or I can make Weiss experience life where she can do whatever she wants. Like a revenge on her father.

Weiss: I might actually ask you to do that sometime.

Manu: Wait, if you can cast illusions then can you also control people?

Y/N: I can. But I won't do it on you so don't worry. 'Unless I get in some deep shit'

Manu: You better not.

Blake: Anyway guys I think we should head to sleep, we have class tomorrow.

Manu: I agree.

Team RWBY started to head out, with Yang dragging Ruby out cos she didn't want to leave, but Blake stayed and entered Y/N's room and locked the door. On the other side you could hear a lot of wings flapping cos the birds left the room. While Y/N waited for Blake to unlock the door he saw Bladewolf lay down at the end of Manu's bed and shut down.

Y/N: 'guess that's how he sleeps'

Soon enough he heard a click and the door was unlocked so he entered and closed and locked the door behind him. When he looked at the bed he got a little nosebleed.

Blake: You made me worried so right now you'll make it up to me.

Y/N: What about the classes?

Blake: Fuck the classes. I need you to fuck me good right now.

Y/N: You better be thankful that I asked Ozpin to soundproof the room because I knew you would do something like this.

Blake: I don't care, now come here.

Y/N sighed and started to undress while walking towards Blake. This will be a wild night.

~timeskip till next day first class brought to you by~

Right now the teams were in the history class which was taught by Doctor Bartholomew Oobleck.

((Oobleck: Thank you for spelling that right.

Author: You're welcome))

The only 2 students missing were Y/N and Blake. A minute later Y/N entered the classroom and Dr.Oobleck immediately appeared in front of him.

Oobleck: Mind telling me why you're late?

Y/N then started to whisper so quietly that only Oobleck heard him.

Y/N: *whisper* I'm sorry but Blake forced me to do the deed and she won't walk for a day. It won't happen again. *out loud* My alarm didn't work.

Oobleck: *whisper* My man, respect. *out loud* Make sure this is the only time. Now go take your seat.

Y/N nodded and went to his seat which was next to Ada. JNPR sat behind them while RW_Y sat in front of them. Oobleck then started his lesson.

Oobleck: Anyway. Today children we will be learning about the ancient race of warriors that were trained to protect people of Remnant while also fighting grimm with such efficiency that one of them could take on 100 Goliath and walk away with minimum injuries. The Night Sentinels. I managed to find an image of how they looked and what weapons they used in one of the books Headmaster had. Here let me show you.

With insane speed he then started to draw on the blackboard and when he finished everyone could see how they looked like.

Oobleck: Anyway questions?

Weiss raised her hand and Oobleck pointed at her.

Weiss: What weapons did they use to fight the grimm? If it was long ago and they didn't have technology then what did they fight with?

Oobleck: Good question Ms.Schnee. They mainly used Swords and Shields but also spears. But an interesting detail is that they did have technology. A technology of such high development that Atlas doesn't even come close to them. They even had a long ranged weapons called Ballista but I cannot show you how it looks like as the book didn't have any detailed description of it.

Y/N: *raises hand* I know how it looks like.

Oobleck: Truly? But how?

Y/N: My family are descendants of Night Sentinels so we have some old journals about their weapons.

Oobleck: Fascinating, could you maybe lend me them for research? Meanwhile please do show us how it looks like.

Y/N walked over and stood next to Oobleck and stretched out his hand as red energy started to form something in his hands. When he finished Y/N was now holding a red transparent ballista.

Oobleck: Wonderful! Thank you Mr.Atlas. You can sit down now.

Y/N went to his seat and Oobleck continued.

Oobleck: There were also elite squads in their ranks. They were called the Marauders.

Once again he quickly drew how they looked like.

Oobleck: They mainly used double edged axe and double barreled shotgun while being accompanied by at least 3 wolves of special breed that were raised to slaughter grimm.

Ruby: *star eyes* 'SO COOL!!!'

Oobleck: Now I'll be telling you about someone very special. A night sentinel so powerful that the ancient grimm, even before the creation of first humans, feared his name. The Doom Slayer. Unfortunately his name was not recorded in history and the only mention about him speaks of his title. He was such a powerful man that he alone could probably slaughter all of the grimm on Remnant barehanded and no one could ever stop him.

Pyrrha: *raises hand* Professor-

Oobleck: IT'S DOCTOR!

Pyrrha: Doctor Oobleck. Is it even possible for such person to exist? I mean what kind of training would you need to undergo to become so strong.

Oobleck: I can not answer that question as I don't know myself. But I do know that to become one of the sentinels you needed to undergo a very and very gruesome training and by the end of it you would need to clear out a nest full of grimm barehanded and without armor. Only then would you be accepted into their ranks. But for those who didn't want to become warriors, they had plenty of different professions. Farmer, teacher, scientist and so on. I went off track, where was I? Oh yes, the Doom Slayer. The only thing to confirm his existence happen to be testaments about him created by simple people. Unfortunately they are written in their language and so far I managed to translate only 2 of them. Let me read them for you.

He then went to his dest and started searching for something.

Y/N: 'should I tell him that I know their language? Nah, It isn't worth it. Maybe later'

After a bit he finally found what he was looking for and took out a small notebook and went over a few pages before stopping.

Oobleck: There it is. Just listen to this.

In the first age, in the first battle, when the shadows first lengthened, one stood. Burned by the embers of Armageddon, his soul blistered by the fires of Hell and tainted beyond ascension, he chose the path of perpetual torment. In his ravenous hatred he found no peace; and with boiling blood he scoured the Umbral Plains seeking vengeance against the dark creatures who had wronged him. He wore the crown of the Night Sentinels, and those that tasted the bite of his sword named him... the Doom Slayer.

Oobleck: This is the first testament. The second I'm about to read is actually a 4th as I'm still translating them. Ahem.

The age of his reckoning was uncounted. The scribes carved his name deep in the tablets of the world across eons, and each battle etched terror in the hearts of the grimm. They knew he would come, as he always had, as he always will, to feast on the blood of the wicked. For he alone could draw strength from his fallen foes, and ever his power grew, swift and unrelenting.

Oobleck: The thing about this one is that they say that he scared the grimm. And that's fascinating enough to continue the research about him. Now our lesson is about to end so I'll give you your task shortly and then you're free to go.

~meanwhile in another world~

???: Hey Carl, how are you today?

Carl: Good. Heading to work what about you Jared?

Jared: Oh its a happy day for me. Just found out that my wife is pregnant and now we're awaiting the 3rd child.

Carl: Congrats man. So any news on the hellwalker?

Jared: Don't know yet. Heard they sent a titan to kill him.

Carl: Damn. So why is he even killing us all?

Jared: I don't know. Heard some dumbass killed his rabbit.

Carl: Damn, all of this because of a rabbit.

Jared: Yeah, recently I put an application for a second chance to go to heaven because I need to get my family out of here. It is not safe here anymore.

Carl: Alright. Wait. Why do I hear boss music?