Sometimes later( Both are 5)….
"Shoton: Gosunkugi " Naruto said as a large spike of Crystal Came from the ground and tried impaling Luffy but Luffy jumped and pointed his finger at the spike and "Dokudan"shot poison bullets.
"Shoton : Fukusū no hari" Naruto said as Multiple Needles of Crystal Formed around him and attacked Naruto. Naruto just coated his fist with poison "Fukusū no dokuken" and punched every Crystal needle coming towards him.
"Let's end this Hebi" A large snake made of Poison formed behind Luffy and it was coated black with Haki. The snake came towards Naruto.
"Bring it on. Shoton : Taka" A large Hawk Made crystal formed over Naruto. It was coated with multiple levels of Chakra, Naruto had named it Toso as he was the second one to use it. The Hawk flew at the Snake and the two collided and there was dust everywhere. The Dust cleared and both of them were proud of their achievements.
"So they were right when they said there were strong Devil fruits here." The two heard a voice and turned to see a man standing there.
"Hello there I am Samuel Nakaoka and I would like for you to die." Nakaoka attacked all of a sudden but Naruto blocked it. Then Nakaoka was kicked in the face by Luffy.
Nakaoka brought out his sword and stroked Luffy but the Sword broke as Luffy had used Teppo. "Shoton : Neru" and Nakaoka was caught by his leg as Luffy held his two fist over Nakaoka's Chest "Rokuogan" Naruto said as a large impact was felt by Nakaoka as he was sent flying.
"You brats are strong. But I am stronger." Nakaoka said as his hand turned into claw and his wing spouted from his back. The Dragon charged at them.
"Shoton : Kusari" large chain of Crystal came out from the ground as it bound Nakaoka.
"That is Cute." Luffy said as he tapped Nakaoka. "Let him go. He won't be able to cause us any harm now." Luffy said and the binding disappeared.
Nakaoka took this ability and attacked Luffy but he just felt himself impact a rock.
"I will kill you." Nakaoka said he would attack Luffy but he just ran straight into the Ocean. And that was the end of Samuel Nakaoka with a Mythical Devil Fruit, the Ryuu Ryuu no Mi, Model: Volcano Dragon.
"So you killed him. I was hoping to recruit him into my Crew, the Beast Pirates. But oh well I saw kill you and be on my way." The two turned too sweet and talked only to come face to face with one of the Worst in all of the Seas, The Future Yonko, Kaido.
Kaido got his bat ready as Naruto looked at him and smiled. "I will fight him." Naruto said as he got ready to fight.
The 5 year old looked fearlessly at the 23 year old. "You should just give up, kid. You are not str-" but Kaido couldn't finish as he was punched across the island by Naruto.
"Yes. You are strong. I shall fight you with my Devil Fruit." Kaido said as he transformed into a Dragon. But it was not that big as even in 5 years of getting the Devil Fruit he didn't have much control over it.
"Shoton: KeishoRyu." Two large Dragons of Crystal Formed and attacked Kaido. The Dragons were coated with Toso so their hit was hard. The Dragons bite into Kaido as he tries destroying both of them. Kaido felt pain as he transformed into
His hybrid form rushed at Naruto with Haki coated fist and was about to punch him but another fist punched and Kaido was flung back into the island.
Where Kaido once stood, stood Monkey D Garp. He had seen the battle between Luffy and Naruto, Both of them and Nakaoka and Naruto vs Kaido. They Had improved much in 1 year but Kaido would still be much for them.
"That was a great battle. It seems you have mastered another one of your abilities. And how many Devil Fruit do you have left to eat?" Garp asked, picking his nose.
"Oh yeah we have mastered it haven't we?" Naruto said in realization. He picked up Mimir and asked "Which nature now?"
"Ah the Dark Nature. You can now use the Meiton." Then Naruto handed Luffy the slab. "And it seems you have unlocked the Gura Gura no mi ability." Mimir said.
Garp smiled. Those sounded scary. He knew Gura Gura no Mi but Dark Nature must have been something special too.
"So what have you planned?" Garp asked his Grandson who began to think about what he wanted to do.
"Let's get some weapons. So we could train in using them. Kaido used his Club really well. I want to make sure we have something we can use when we can't use our Devil Fruit." Luffy said after some thought.
"We can just make weapons using our Devil Fruit. You are an idiot ya know." Naruto said as he laughed at Luffy but people sweat dropped as he was the stupid one.
"Let's go get you a weapon then." Garp said as the ship set sail for Marineford.
"I feel like we are forgetting something." Luffy said to Naruto who just smiled.
"If we are forgetting it then it must not be important." Naruto replied.
"You are right." Luffy said as he looked at the sea.
With Kaido…
Kaido picked himself up. He was injured by a brat. He would remember the humiliation. "Naruto, you will be dying in my hands. WORORORORO." But Garp had placed some sea stones on him unabling him from using his Devil Fruit and Kaido was also spent. So he was captured by some Marines sent by Garp.
Back with Luffy and the rest…..
"Choose any weapon you want boys. I will get it for you." Garp said as the boys began to look. One sword caught Naruto's eye and he picked it. It had white hilt with white sheath.
"Oh that is a good sword. It is the Keiro e Eden. That sword was not special on its own but then it was fed the Hebi Hebi no Mi, Model: Spitting Cobra. It is quite a deadly sword now. You can take that." Garp said as Naruto unsheathed it. He looked at the blade and felt that the Sword was good.
But Luffy was still looking for one. He found it. It was actually embedded into the ground.
So that is it.
Shoton- Crystal Release
Gosunkugi- Spike
Dokudan- Poison Bullet
Fukusu no hari- Multiple Needle
Fukusu no Dokuken- Multiple Poison Fist
Doku Hebi- Poison Snake
Taka- Hawk
Neru- Bind
Kusari- Chain
KeishoRyu- Crystal Dragon