Naruto : The Demon Swordsman

The beast was large fully covered in sharp black feathers. He was similar in size to Gamabunta and the Eight-Tails, with large wings.

Kaito felt it was quite menacing. The most weirdest thing was that It did not even have a head instead it had a mouth on its chest, with bones protruding from it. It also has a long thin tail, and its hands and feet are clawed and sickly thin to the point where it looks almost bone-like with skin attached.

"What the fuck is that?" Kaito cursed as he shouted pointing at the beast.

"I believe that is a beast sealed inside that box and was probably responsible for controlling Genkai sensei. The large amount of chakra that he had just absorbed might have helped him break out of the seal." Yoriichi answered knowing who the beast was from his knowledge of Canon.

"Kekekekekeke Finally I am freeeee. Kekeke..." The beast laughed for a few more seconds as he enjoyed his freedom.

He then looked at the Uzushiogakure shinobi, especially at Genkai.

"Human, You have my thanks for freeing me." The beast said

"Me? I was not the one to free you. The guy who just jumped inside the box was. And by the way, What are you?" Genkai asked as he got up despite his injury.

"That human was only the catalyst. His chakra or the hundreds of humans that he has given me before were only able to help me break only 75 percent of the seal. Your chakra though was special which strengthened me enough to break through the seal." The beast explained

Seeing the beast was intelligent and was speaking calmly, everyone except Yoriichi calmed down not expecting a fight from the 'grateful' beast.

"Oh, You're welcome, What is your name and What are you going to do from now on?" Genkai asked

"My name is Satori and I am going to destroy you humans after I consume your entire chakra," Satori said licking his tongue while looking at Genkai and then he rushed towards Genkai at a speed that was unimaginable for a beast of his size.

But Yoroichi was ready.

'Thunder breathing: First step:Sixfold'

Within a flash of lightning, he was in front of Satori and tried to sever his wing off but Satori had already dodged.

Ken pursued after him but Satori dodged the attack again.

The chase continued for another four attacks before Ken gave up. Satori though attacked Ken but was intercepted by two crustal chakrams which were being controlled by Kaito.

A giant Jiro tried to smash him with his giant fist and Kakazu elongated his black threads and tried to trap him but Satori effortlessly managed to dodge all these attacks.

"Can this thing see the future ?" Chino asked seeing Satori dodge attacks before they even reached him as he landed back on the ground realizing that he would not be able to eat Genkai's chakra that easily.

"Not quite, It senses our bloodlust," Yoriichi said

"How do you know that?" Kaito asked suspiciously.

"I just know it. Focus on trapping this beast back in the box for now." Yoriichi said as he was not going to tell them that he knew it because of his previous world knowledge.

Due to the Box of Ultimate Bliss, Satori's body can detect fear and blood lust, which causes it to instinctively dodge essentially all attacks from opponents who have any fear in them or who desire to kill him.

Yoriichi activated his dojutsu and several miniaturized black rods attacked Satori but before they could even reach him he soared into the air efficiently dodging the attack.

Genkai teleported behind him and tried to absorb its Chakra but failed as Satori had already escaped from there. Its speed was even faster than some boss flying summon beasts.

Genkai teleported behind Chino and Kakazu as his wound had reopened after doing that maneuver earlier.

Kakazu stitched that wound using his threads.

Satori though did not wait for them to continue their onslaught as his feathers launched towards the Uzushiogakure shinobi who used their defensive jutsus to block them or sword in case of Yoriichi.

The feathers were extremely sharp and struck as a missile.

'How do we even defeat this beast? In the anime, it took a lot of Leaf Shinobi, Naruto in sage mode, and B in full-tailed beast mode to seal it.' Yoriichi thought before an idea came into his mind.

He grinned 'He counts as a beast right? That means I don't have to kill it. I don't even need to seal it. I just have to make him bleed.'

Yoriichi's excitement grew.

'Yes, Yes, I have finally found myself a worthy summon for myself. Someone who could fight against even eight tails.'

He looked at Satori and said "You have proved that you are worthy enough to serve me. Well, that is if we don't count your looks and bad attitude. But you would do."

Satori though was confused and asked, "What do mean Human?"

Yoriichi just grinned as a scroll appeared in his hands. It was the summoning contract that was provided by God as a gift for him and now he was finally going to use it.

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