Reincarnated as the Demon King's Son - Chapter 639 Oiled Machine

A college student, accidentally reborn into the world of Naruto, becomes a member of Uchiha who is destined to be exterminated.

In this cruel ninja world, in the face of endless wars and exclusion from the village, what will Uchiha Qing do?

PS: Later in the book, the protagonist will develop a system of immortal cultivation. Cultivating Immortals in the Ninja World, have you seen it?

- Description from novelbuddy

[The citizens of planet #674589 has been given the opportunity to awaken.]With this abrupt message that appeared out of nowhere, the world as everyone knew it had ended.A series of apocalyptic level of natural disaster washed over the Earth, claiming numerous lives in the process.Every lifeform on earth that managed to survive the apocalyptic natural disaster was given immense power.Animals metamorphosed into terrifying beasts and various plants gained self-awareness, while the surviving humans gained powerful supernatural abilities.Leo, a young man finally left the orphanage, a place he'd called home for his entire 16 years of life. With his dreams of finally breaking free and experiencing adult life outside of the orphanage finally coming true, his world was turned upside down after receiving the message with the rest of the world.Freedom was no longer something given, it now had to be earned. This apocalyptic and ruined world was something that could take kill him in an instant.[Requirements met. First Seal Broken.][Innate skill awakened: Regeneration.]

Year 2099, the world as we know it now advanced in technology. Learning has become easier, and so is transportation. But in this new advanced world there is undoubtedly problems, beings who want to use the new technology to bring chaos and strife to humanity. Xander, a 17 year old normal High school boy buys a new MMORPG game and through it, he improves his skills in all aspects. He lived a normal life until one day when his father, who abandoned him and his mother for a year came back, claiming to be the leader of a group of super humans. This was the day Xander’s life changed. He was told he will get a power to stop the enemy but what will it be? Is he even ready to take on such a responsibility? Nobody knew that this enemy group were in charge of G. CO, the creators of League of Guardians virtual MMORPG game. What they plan to use the game to accomplish was... absurd... but anyway, read to find out. Let’s Follow Xander on his journey as he becomes the strongest Super human and save humanity from doom. ... [You have killed level 51 reaper] [Do you wish to demonify, level 51 reaper?] “Yes.” [You have created a new demon, Lich] The ability to create demons from dead creatures. With this power he shall defeat his enemies and get his peaceful life back.

Genius Neurosurgeon Lǐ Xīnyuàn died while being held at the gunpoint to perform a surgery on a terrorist leader.When he opened his eyes, he had transmigrated into a world similar to a Webnovel he'd been forced to read by a colleague.Now you'd think Lǐ Xīnyuàn had transmigrated into that Webnovel. But did he?No! Instead he'd been transmigrated into that webnovel's spin-off/“what-if” version of the story with nothing but the superficial knowledge of the plot thanks to reading the main novel.Now tasked with the mission of avoiding plotholes, unnecessary dog-blood, death and following the storyline to ensure the male lead's ascension to the throne of Supreme Emperor, he didn't know whether to laugh or cry.And why did no one tell him that his character had to be married into the Male Lead's harem??What about the Female Lead?Later:Lǐ Xīnyuàn: Why doesn't Your Highness spend the night with concubine Yang?ML: Don't want to.Lǐ Xīnyuàn: ... Why?ML: Are you pushing me away?Lǐ Xīnyuàn: QAQ