Kenshin after doing 6 months of vigilante work stood in an abandoned beach. Kenshin has always maintained a calm face in most of the situation in his life. But today as Kenshin was going to the next world for his training, he was happy and it was showing on his face.
"Here I come, One Piece World", shouted Kenshin excitedly. After a few moments he went back to his usually calm face and said, "Okay, I should call Supreme Being 'Gandalf' now. But wait how should I address him, as the last time I just only answered his questions and not addressed him".
As Kenshin was busy thinking, a voice came from behind which was familiar to him. He sees that he is in a familiar white space and not on the beach.
"Hello my child, I see you had and a nice life in this world and you want to move to the next world. Am I right?", said Supreme Being.
"Yes", answered Kenshin.
"And yeah you can call me whatever you like, maybe even Gandalf", said Supreme Being.
"Yes Gandalf", said Kenshin.
"Okay from what I have heard you want to go to One Piece", asked Gandalf.
"Yes and Gandalf how did you know I want to go to One Piece", asked Kenshin.
"If you can divide your soul to multitask, then can't I do the same. Okay tell me which timeline, do you want to go", said Gandalf.
"Hmmm… I originally intended to go after Ace's death and train for 2 years and then set out at the same time as Luffy but I cannot miss the Marineford War which will help me know my power and know the strength of strong individuals of One Piece. So I have decided to go 3 months before Ace's execution and if possible send me to an uninhabited island near Marineford which would have very strong monsters", said Kenshin after taking a long consideration.
"Okay my child, there you go. Enjoy your life more and don't be in a hurry to leave the world", said Gandalf.
"Okay Thank you Gandalf", said Kenshin.
After that bright light covers Kenshin's eyes to which, he closed his eyes. When he opens his eyes he saw he is still standing on a beach but the air, the whole feeling is different. The sea is bright blue colored. When he looked around he saw, a large forest and each tree was about 50-60 meters.
"Wow, I love this. The air is pure, seawater is clear, the sky is nice too. But the only problem is strength is above all to which I don't have to worry about it a lot", said Kenshin.
"Let's check the forest and its creatures. I will fight with them and if I cannot defeat then flee. I will check my strength with them", said Kenshin.
After that Kenshin went inside the forest. The forest was very dense covered with all the shrubs and bushes. Within 5 minutes Kenshin saw an animal. It was a wolf but the wolf was about 3 meters high, 5 meters long.
"Wow, they sure are huge. Oh yeah I remembered I might be of good height according to my last world but to this world, this height is not worth mentioning", said Kenshin looking at the wolf.
Like Kenshin, the wolf was also looking at Kenshin with a vicious gaze like it had already decided to eat him. After a few seconds, the wolf launched itself towards Kenshin. After launching it swiped its claws.
The wolf was very fast but to Kenshin, it was very slow. Kenshin dodged the wolf claws, the punched the wolf ribs using "Breaking Moon" technique with 10% of his power. The wolf was blasted away about hundreds of meters breaking all the trees in the path.
"Ohh I think I used too much of my power. But then again it died so it will be bad if I don't eat it. Anyways I have read the "Iron Stomach Technique", which converts food into ki", said Kenshin.
After that Kenshin used about a few minutes to cut the wolf(cut using ki sword) into pieces and place it to roast. About half an hour later the wolf is ready to eat(as fire is strong and meat is tender).
"Wow, it's so tender and juicy. No wonder Luffy liked it so much. I haven't even added salt and spices. If I add them then this will be heavenly", said Kenshin while taking a bite of the meat.
Within 15 minutes, Kenshin finished about 500+ kilos of meat using the Iron Stomach technique.
"Well, I have eaten a lot. I think I will cultivate for an hour then move inside of the forest", said Kenshin.
After cultivating Kenshin found that eating increased hi ki though a bit but the amount is noticeable.
After that Kenshin traveled for about a few hours before he went from where he came. After coming back he has the corpse of a huge bear about 8meters tall with about 1000 kilos of meat. Actually, Kenshin didn't want to kill it but it started attacking Kenshin in a ferocious manner and Kenshin got angry and punched it too hard and it died.
After coming to where he had roasted the wolf, he brought logs of wood and started to roast the bear after cutting it down. He also made utensils by carving the wood using his ki sword.
Kenshin then collected the blood in the buckets he made. After filling a few buckets he let the other flow. After about 40 minutes, the bear roast was ready. Kenshin ate all of the means within 20 minutes and spent the next hour cultivating.
After cultivating Kenshin, he got a bit thirsty so he used the blood in the bucket to drink. Well Kenshin hasn't found a freshwater source and he doesn't want to drink salty and dirty water, so he drank the blood instead.
After that Kenshin looked around and saw that it was almost evening Kenshin said, "From tomorrow, I will completely search the island to find a cave to sleep and freshwater to drink".
After that Kenshin went on cultivating. For One Piece, Kenshin divided his soul into 5 parts. The 1st part trains in martial arts, 2nd part trains DDD cultivation technique, 3rd part cultivated turtle Breathing Technique as he spends most of his time training in water, 4th part in Haki, 5th part checking the surrounding.
And if he isn't using one part then he can use that part to assist others. Like during cultivation after eating. Kenshin was using 1 part to check the surroundings and the rest of them to train DDD.
"Today, I will train in Haki and search for sword arts as it will look cool", said Kenshin.
After that Kenshin spent night cultivating. Kenshin notices that he made a great improvement in Haki. All his Haki's are at a basic level. Kenshin began to wonder and thought, "It is said Haki is the solidification of will, but the will is from the soul. And I have a strong soul which might have been the reason for it".
After that Kenshin uses Haki to cover his hands, then uses Haki to see with his eyes closed, then used conqueror Haki to faint insects. Kenshin then realizes that the way in which, he was using his soul to look out for surrounding was very rudimentary and Haki is a bit advanced form of it.
After that, Kenshin uses his ki to boost his speed as he runs around the beach. Within 20 minutes he returns to the place where he had started. Kenshin found that this place had a circumference of about 200 kilometers.
After that Kenshin went inside the forest with eyes closed. He also uses conqueror Haki to any animal he didn't want to fight. If the animal didn't back away after using conqueror Haki, then Kenshin uses only his physical power and beginners armament Haki to fight the monsters/animals.
After about 4 hours of constant searching, Kenshin found what he was looking for. He found a waterfall and moreover there is a cave behind it.
Kenshin rushed towards the cave behind the waterfall. There he sees a monster resting inside the cave. When Kenshin came, the monster opened his eyes and looked at Kenshin. The monster has a tiger head, lions body, eagle-like claws in place of legs and crocodile's tail.
After a few minutes, the monster roared and used his claws to attack. The attack was very fast. Kenshin has to take this seriously. Kenshin used the "water flow" technique to dodge and kicked the monster using "cutting seas".
The monster was uninjured by Kenshin's attack. Kenshin then began using his full power. Kenshin's body was coated with a layer of white light, it was a technique to boost physical power using ki.
After that, the monster swept his tail which came with a destructive force. Kenshin covered his hands with Haki and used ki to used the "Breaking Moon" technique. This time the monster was injured. This fight went for another few minutes before the monster died.
After occupying the cave, Kenshin cut a few trees to make big buckets to store water, containers to eat and many things. From the next day, Kenshin spends the next 3 months(not exactly 3 months) to train for the war.
The went was as follows. Kenshin would wake up do some light stretching, then eat, then cultivate DDD, after that went underwater to multitask by practicing, Haki, Unarmed Martial arts and cultivate DDD, after that Kenshin would come out of the sea and eat something. After that Kenshin would practice his own Sword Art using a wooden sword.
By the end of 3 months, Kenshin's martial arts, sword arts, and Haki have a huge breakthrough. His physical strength increased but it is not drastic. His ki increased has increased by 4 times. (due to eating a large amount of meats and converting it to ki).
Kenshin's martial arts, sword arts, and Haki were all at the master level by the end of 3 months of training. Kenshin was very happy with it as he is ready for the war. It was due to Kenshin's martial arts and sword arts practice for a few centuries and his powerful soul.
Swordsman/ Martial arts- Beginner< proficient Beginner- attack power and speed increases Proficient- attack power and speed increase by a huge margin, sharpness also increases which causes to cut through steel/iron. Expert- Flying sword slash. Master- able to cut steel with a wooden sword and also to not cut even leaf with the sharpest sword. Grand-master- able to harm logia type users using his strike without Haki. Legendary- create a domain in which one can attack as his wish. Haki has a similar gradation. Kenshin's Sword Art- Heaven Destroying Sword Arts. 1- Rising Demon 2- Daylight Slaughter 3-Bloodied Horizon 4- Devastating Sunset 5- Chilling Night 6- Midnight Death 7- Destroying Earth 8- Destroying Sky 9- Destroying Heaven The first 6 focuses more on technique and close combat fighting whereas the last three are for pure destruction.