Above the Galaxy - Chapter 39 - 26, Ultra Kill!

[Wsa entry.]James Dohan, a famous author working for the government, suddenly died after an accident occurred at his workplace.Nothing could have prepared him for the events to come.[You have reincarnated.]James soon found himself reincarnated into the body of Jared, the son of the village's elder in a demon-infested wasteland.The North, abandoned by a cowardly kingdom after a brutal war, crawled with monsters and desperate survivors. Jared left to save his father with a miracle cure, but James arrived too late—the Elder was dead, the village was starving, and the title of Elder fell on his unprepared shoulders.Luckily, he had a cheat code to rely on.[You have awakened your Infinite Item Shop System.][Current balance: 0 Sp. Buy everything, Sell anything.]Jared found a way to save the people of his village from dying from their own weakness and the horrors of the world.[You have gained 50 Sp.][You have purchased a pistol.][13 Sp has been deducted.][You killed a Dire Wolf.][150 Sp has been added to your account.][The villagers' loyalty to you has risen.][You have earned 300 Sp.][You can now convert this world's money into Sp.]With this system, Jared was more than ready to conquer the North, money, power and women.

Kanda Kyoichi transmigrated to Konoha and became a temporary instructor at the Ninja Academy. Fortunately, he awakened the Mentor System.By teaching others, he could earn rewards.Thus began Kyoichi’s career as a “teacher” in the ninja world.Shisui: “Sensei’s unique interpretation of the Will of Fire has given the Uchiha Clan a true sense of direction!”Asuma: “The essence of the jade lies in protecting the people, with the advanced leading the way for the less experienced. Only then can Konoha become stronger!”Kakashi: “He’s my life mentor. He transformed Konoha!”...Years later, in the memoirs of Kyoichi, now the Hokage, he wrote:“I honestly just wanted to be a life mentor!”

In a world fraught with innumerable dangers where living day by day is a struggle, a young man from the modern age transmigrated into such a world, accompanied by a peculiar system made for assassination.

A decision can destroy the sun, moon and stars. A finger can kill the Heavenly Overlord. While chatting, the Heaven and ten worlds can be annihilated.

A poor little kid walks out from a remote mountain area while holding the Nine Dragons and the Incredible Cauldron. With a control over the time and space eternally, he embarks on the Path to God where he defies the odds of the boundless universe gaudily by fighting against royalty and clashing with the legendary generation.

- Description from Novelupdates