While Sasuke, Sakura and Naruto was training in the river, Kakashi began to inspect an unique sword he found out after killing an arrogant shinobi from Amegakure while he was nearby to the abadoned second house of his father.
"A sword that generates lightning." He murmured while seeing purple spark coming out from the blade.
Kakashi wondered and thought the sword to be infamous Kiba from the Kirigakure, but he is not sure as info and even appearance of the swords are limited, since they were weilded by the elite shinobi, who rarely leaves victims alive after seeing their sword.
He only know from his father that the Kiba was the first sword that exist that can generate lightning.
However, looking at the hilt of it, he realise it resembles Senju clan symbol.
'Then it might be Raijin no Ken.'
Second sword his father told, having the same ability thanks to geniusness of 2nd Hokage,Tobirama Senju who manage to create it to cover up his weakness on earth based jutsu.
However, it said to be fragile unlike Kiba, suitable only to use lightning it generates.
'It can allow me to use lightning jutsu without using mine chakra.'
'It can also enhance and reduce chakra comsumption of my lightning jutsu.'
It was suitable weapon to keep, especially since he still have a long way to make a Fūinjutsu that allow him to seal amd unseal his Sharingan at will, so that it doesn't eat most of his chakra until he needs use his Sharingan.
Just as Kakashi pour his chakra into the sword to check it capability, he found an additional ability, no one knew before.
***
5 Days has passed since the day.
Contrary to what Sasuke estimated, it far longer than he imagined.
While his EMS accelerated his growth, he also found couple of mechanic of his abilities.
Sharin no hensō last 1-2 minute if use conjunction with Bunseki, or Amaterasu and Blaze Release: Kagutsuchi but can't use all of them at the same time.
And he predicted he could increase duration of Sharin no hensō and Sharin no hensō with Amaterasu and Blaze Release: Kagutsuch based on his chakra reserve.
But it was only good thing he found.
The most disheartening fact he found out about Bunseki, that it was never tied to down to his chakra reserve in the first place!
It has fixed 5 minutes period of use which shorten to 1-2 minutes with use conjunction with only Sharin no hensō, where he can't could not use EMS more than 5 time which each usage has a strict 2 hour interval!
He sometimes laments himself for begging the god, that actually put restriction on him, depriving of power he could get it he shut up.
'I guess I was not one of one the OP reincarnated shown in novels.' He mocked himself for being delusional.
Despite of it, his resolve to live did not falter, as his fear towards that guy was still vibrant.
Also he still has an advantage of knowing Elite shinobi to Kage level enemy ability in advance.
'My main headache is Black Zetsu anyway, as I can stop Edo tensei and use Naruto for the fight against Obito and Pain while giving advice.' Sasuke concluded, still could not come up with a way to deal Black Zetsu.
"Sasuke, did Kakashi sensei said when will he come back?" Sakura asked him, who expected Kakashi to come just after they finish last part of their training a day ago.
Sasuke shooked his head, Sakura sigh and while Naruto was sleeping at river in the morking.
Without any care in the world.
'He is definitely less annoying than the one in anime.' Sasuke thought, who is already accustomed to him.
"Speaking of the devil.' Sasuke said before cut short by Kakashi who carried four heavy bags on his back.
Naruto wakes up and went towards his teammate.
"Sorry guys, Lord 3rd called me yesterday. Anyway, since you guys are so good at chakra control training, I decide you should guys also train in other chakra control training as well." Kakashi said before putting 3 bags to each of them.
He ripped open the bags, revealing sand found natively in Suna and Iwa.
"Here you will infused chakra in to the sand to manipulate it and count each individual sand grains." Kakashi said casually, while Sakura was feeling dizzy after hearing his explanation.
'Is Naruto alright?" Sasuke worried when he seen Naruto not reacting to it.
As if he was frozen in place.
'Good thing they don't know who suggested this.'
Before the 3 begin their training, Kakashi called them again, who did not finish his words.
"Unlike other days, you will do it only 3 hours."
Kakashi continued: "After taking break, I will train you how to fight without chakra, since their is plenty case shinobi die if they weak at
close combat when they run out of chakra."
He then revealed the fourth bag, that had equipment ranging from kunai, trench knives, katana, tantō, ninjatō, chokutō, jian to brass knuckle, tonfa, makibishi, weights and smoke bombs.
Sakura and Naruto became lively in a second while Sasuke glad he is finally going to learn Kenjutsu.
Sakura and Naruto happily begin their chakra training, while Sasuke looked at Kakashi left leg, that seem to be a bulge.
'Does he have it big or I am imagining things?, Sasuke thought, not recoginising Raijin no Ken underneath.
Kakashi watched and sighed in relief when no one notice the bulge.
'Though I should hide it better.' he thought, not paying attention to looks he already got from people in the street.
Looking at the three Genin, it was obvious Naruto was struggling the most, for having too little focus on counting each of them and his clone did not help much considering they have the same personality.
Sasuke was also struggling due to boredom, but still was decent enough thanks to his EMS while Sakura thrives thank to her superior chakra control , already far ahead from his peers.
'It seemed she like Orchimaru, Minato sensei and Jiraiya, have awakened dominant part of Senju bloodline.' Kakashi thought, to justify her talent, since most of population in Konoha have Senju Bloodline including Kakashi father.
Kakashi began to remembered his father words, where clans such as Sarotubi, Hatake, Shimura, Akimichi, Nara, Yamanaka and lesser known clans were under Senju banner as one clan against Uchiha, Hangromo and Fūma clan.
After formation of village, Senju banner was defunct, were Hashirama Senju and Tobirama Senju encouraged to drop the Senju surname in favour names given to factions, hence Senju clan 'disappear' and 6 or more clans reappeared in the surface and 2nd Hokage even encourage inter-marriage where currently only thr Hyūga Clan have no trace of Senju bloodline.
Of course neither he nor his father knew why they did it, until 5 days ago.