Reborn in demon slayer as an Uchiha

Mysterious Figure

I can basically copy anything that I see as long as it not inhuman, so I could technically copy breathing style, but heh that's not my goal right now. My goal is to at-least master flame breathing and learns sun breathing somehow, I try to remember anything about sun breathing but the only thing I remember about it, is the dance.

I decided to sit down and meditate, to have great gain I must exercise my mind and my body. The body part is a check for me so I must now train my mind while I meditate I decided to have some image training in my head.

Inside his mind
This place is unsurprisingly empty there is nothing in there, I know I'm dumb but jeez at least have some space occupied, while I'm thinking that in the background an image of someone is forming.

While im pondering on my thoughts in my own mind.....I get punched so hard in the gut that I went flying while spitting out blood, wait how is that possible how can I bleed in my mindscape that should be impossible, but while I was still pondering over my thoughts I get the uppercut so hard I can feel my jawline get rearrange, it hurt.

I look at the figure that was just beating my ass, and he looks like a shadow, he started running at me again.

He went straight for my head but I dodge out of the way it was faint turn out it was a faint, he send me flying with a kick. I try to regain my momentum, but he was already behind me, he proceeded to handprint his fist into my gut with the meanest punch I have ever seen.

I'm not gonna lie, but I'm getting my ass handed to me this thing won't let me fight back, there is only one of him so that should not be a problem.
"Shadows clone jutsu" I heard his voice for the first time in the background.

then suddenly there were 50 of them.
"Oh fuck I'm gonna die, "I said looking terrified because I couldn't handle one of them, 50 of them are gonna kill me. I felt powerless.

All I could see were fists hands feet, kicking, sky, light, and darkness but no matter what happened I didn't die. I looked broken beyond belief, and then I decided to take the sword that was just right there. I went at him with my blade to cut him and smack all the clones out of the way.

He took out a sword in ran at me too. he started to attack me, left right up down all I could do was a blood, I could barely keep up so I decided to turn on the Sharingan in see if that make a difference but the shadow suddenly had a red eye.

I got sliced and diced but I kept on going I don't know how I'm still alive but I'm just slicing in dicing without any sense of time or direction no matter what I do he's better and stronger at it than me.

"Flame breathing ninth form Rengoku" I yelled out of my lungs with everything I had in swung my blade at him we clash my blade broke in he sliced my head clean off.

I suddenly open my eyes and saw that I was sweating like crazy while I was meditating.'So all of that was in my head' I thought as I walk to the bathroom to go take a bath because I stink.

After that, I looked outside in saw it was dark so that mean I was meditating for a whole day.

I feel much stronger already mentally but is this shadow dude the way that I can try to get ninjutsu techniques? I can do any easy technique for the love of God so I guess today was shadow clone, huh I saw the hand sign but I don't wanna find out the hard way that I don't have enough chakra for it and then die of chakra exhaustion. I'm going to try about 3month before the test because it gonna be useful in kinda making out why il need a fast training method I told myself while going to sleep. (A/N the only jutsu he learns from the shadow dude are the Chidori, fireball, some healing Justus, the explosion seal that all, and probably also the Rasengan but that all before we never see him again)