Naruto: Kurotsuchi Mayuri - Chapter 350 - 247 : Orochimaru and Danzo!!

Anyone who could construct a stable Spell Model could become a Wizard — that was the Wizards’ ultimate secret! Having been given a new life as the son of an aristocrat and armed with a super quantum computer from his past life, Spell Models came as easily as breathing to Merlin. With this overwhelmingly huge advantage, would Merlin become the greatest Grand Wizard of all time?

- Description from Novelupdates

After traveling to the Great Wilderness, Shen Can became the Ancestral Temple Keeper of the Blazing Flame Tribe due to his 'frail' body, responsible for the daily cleaning, offering incense, and routine sacrifices at the Clan Ancestral Temple..Shen Can fulfilled his duty as Ancestral Temple Keeper by using the 'Simurgh Blade' to pierce Wild Beasts' necks, extracting their blood to offer to the ancestors, only to discover that he could absorb their lifespan to deduce a cultivation method.

The Unveiling of Secret Queen

Keith, a regular office worker from Earth, suddenly transmigrates to the world of the novel he had been reading for the past decade. The new world, which was also called Earth, was slightly different. People with various powers existed who were called awakeners, making this world comparatively dangerous and also mysterious. While he was thrown into the novel’s world, he was also given a mystical ability to grant systems to other people. Armed with his special ability, he slowly climbs up the power ladder by taking “taxes” from the people he would give systems to. The only question that remained, was what would a realistic normal man, when faced with a similar minded protagonist, do when their goals opposed each other.