For 4 months, Retsu trained.He had regained the memories he needed and as such, he quickly came back to the original level of Orochimaru.He trained in every aspect and put extra attention to seals.He had a decent Taijutsu, and his kenjutsu was definitely at Jonin level.
It was truly a challenge to train at first, the memories were difficult to organize and he couldn't just decide on what would be the first thing he had to focus on.SS told him that he lacked Jutsu so he trained in Ninjutsu and Genjutsu, he couldn't really become better so quickly in those parts but he still made progress.
In 4 months he had reached the Level 160 which nearly qualified him as a Super Kage, according to SS of course.He had the necessary experience from Orochimaru's memories so he had only three choices to quickly get more power.
1-He could get bloodlines, like the Sharingan or the Shikotsumyaku.
2-He could just train with hundreds of seals, even though this technique was mainly used to train physically.
3-He could ask SS.
He chose the third as it was the easiest one and received a special answer.
[Fight, accomplish missions and steal everything you can from your ennemies.That way you'll naturally become more powerful.Training is only for those who starts from nothing, you're not one of those people.]
With that in mind, Orochimaru decided to go to Demon Country.He had the mercenaries from Mito and his own Ninja, but he wanted more.As soon as he arrived he saw a village.Youkigakure no sato.
The ninja village of Demon Country wasn't a joke and was really constructed.Orochimaru wandered in the village for a little bit, and saw how stupid this idea was.They never had enough qualified Ninja to proctect the village, plus the country wasn't in the best economical phase when it was constructed.It was simply a project too ambicious, for what Demon Country could actually do.
When he saw this, Orochimaru didn't hesitated and started to recruit everyone he could, using Kodaka's name to hide his identity.He also saw Iwa ninja in Demon Country but didn't paid attention to them.
Apart from the Training and Demon Country, he also started his plan to create a slave army, which would be a great help since he only had an undead army for now.The only place he could go to for that, was Fang Country, a country ruled by Mafias and criminal organisations.Orochimaru had to literally murder every single crime bosses to clean the country.After that he was rewarded by the Daimyio who asked what he wanted.
"What i want?It's your job!!"
Orochimaru had shred the man into pieces with Kusanagi and proceded towards his throne.He turned around and saw all the Daimyio guards looking at him.
"What are you all waiting for?Fight!"
With this he slaughtered all of them.The samurai couldn't do anything against him, that much was an undeniable point.
Talking about Samurai , he heard that the Samurai's country, Tetsu no Kuni was chosen to hold the second Gokage summit.The first one was held in Suna and it had been about the threat of Yonbi, Gobi and Rokubi who hadn't been captured and thus roamed freely in the Elemental nations.It had been held at the time Tobirama became a Hokage.
This summit was about the threat of the Akatsuki, something that even Iwa began to understand since they stopped hiring the Akatsuki.The Hokage requested the help of all the other villages so that they could destroy the Akatsuki before it was too late, the Kages weren't really going to accept but the mention of the Rinnegan nearly made them faint of the spot.
Jiraya had identified the leader of the Akatsuki, Pein the wielder of the Sage's eyes, the Rinnegan.This was enough for all the villages to take actions.All five major Ninja villages were to track the Akatsuki and capture it's members or kill them on sight for some.
Only Orochimaru wasn't tracked with the Akatsuki, why?
Because he betrayed them.As the backstabbing traitor he was, he lead four of the Akatsuki's members into a trap.They were ambushed by many platoons of Anbu from every villages.Kisa and Kakuzu died, while Izumi and Hidan were captured.Obito became livid and tried to attack Orochimaru, only to have his right arm nearly cleaved by a trap set by Orochimaru.The snake had become so good at seals that his entire Laboratory was filled with traps that even Mito had called.
'So ingenious no one other than an Uzumaki could counter them.'
As all of this happened, the people detained in the cells were another problems.Naruto was slowly becoming Orochimaru's puppet, as the snake used Genjutsu and lies to trick the young Uzumaki.Yet it wasn't actually necessary.
"I know they treat me as a monster,a demon, a worthless child who should die.But.....WHY?!WHAT DID I DO?!"
Were the words Naruto said before he was reduced to a sobbing mess.Orochimaru had to smile sadly at that.At one point in his old life he felt like that.Many people expected things from him, while he was nothing more than an useless Otaku who never tried to live a normal life.He had been scorned and hated, people laughed at him and that's why he felt like Naruto.
He approached the boy with the widest smile he ever had and said
"Then, why not kill them all?No, better!Why not torture them, make them feel even worse than you felt.You don't have the right to do that, but......Did they had the right to do that to such a young boy, an innocent one to that.No!They're monsters who tried to destroy you, become worse.Become....Worst than they could even imagine, you won't be Kyuubi's Jinchuuriki.....YOU'll BE KYUUBI ITSELF!!!"