The Goddess's Personal Doctor - Chapter 6 - : Iron Buddies

Condition 1: One yellow scarf soldier rune is satisfied

Condition 2: Kill 100 rune monsters independently

Condition 3: 5,000 times of training to kill a pig with a knife is satisfied

Condition 4: 10 Spirit Talisman Pills are satisfied

Rune unlock upgrade.

Your source runes have been promoted from ordinary quality [Yellow Turban Soldiers] to premium quality [Yellow Turban Warriors]!

- Description from novelbuddy

Until he became the lowest-ranked master, his lonely and luckless life never changed.

Suddenly one day, a descendant injected him with a nanomachine, and the machine started ‘speaking’ to him.

“What? What are you talking about?”

This was beyond the boy’s knowledge, he turned pale.

The Nanomachine linked to his cerebrum realized the User was not understanding a single word it said.

“Who are you, and why are you doing this to me?”

“Nano Mashin?”

The boy’s face hardened.

Mashin was the deity the Mashin Religion worshipped, along with the Sacred Fire.

The religions’ Master communicated with Mashin.

“Um, are you really Mashin?”

The boy knelt down and asked with a trembling voice. At this, the Nanomachine attached to his cerebrum realized it had been misunderstood.

Some say reincarnation is a blessing, but for me, it's a dreadful curse. Cursed with endless reincarnation, I've been reborn as a villain 137 times. And all 137 times, I've been toyed with and killed by heroes who are far more cruel than the said villains... If I can't win no matter what I do, then I'll crush those so-called heroes at their very roots. - Quality Fan Translations, Made by Fans for the Fans - Villain Takes Over The Academy

In Bleach, with mediocre talent, the protagonist has been flatlining for thirty years. But with the sudden completion of the Zanpakuto conception, he has become a “sword person.”Unlimited Blade Works, essentially “unrestricted swords.”Since Soul Society does not allow two identical Zanpakutos to exist, then I just won't use my Zanpakuto, and that should be fine, right?Who is the strongest in the Zanjutsu category: Zangetsu or Zangetsu: Black?Who is the number one in Assassination Techniques: Ichimonji or Suzumebachi?Which is stronger: Kinshara or Senbonzakura?Can the Yami no Tachi Shura and Yami no Tachi Rasetsu compete for the title of the strongest Zanpakuto?Unlimited Blade Works, essentially “swords,” all the “swords” in the world are mine. Yamamoto, even you, the head of the 1st Division, “Black,” cannot take away my “swords.”