His Contractual Mistress - Chapter 8: Acts On the Spot

A young boy named Chen Zong got lucky and found a mysterious Sword Seal. With the help of it, he rose to be a God in Sword who defeated innumerable top talents in all universes from a remote borderland.

- Description from Novelupdates

Alternate Title: Kumo Desu Ga, Nani Ka? - Game SystemElliot? Yeah, he got isekai'd. Bam! Straight into the world of “So I'm a Spider, So What?”. And guess what? He wasn't some puny human or, well, a spider. Nope, he lucked out and got reborn as a freakin' Earth Dragon!But wait, it gets better. Ding! He awakened the 'XX Worlds Game System'. You know what that means? Skills! Skills from all sorts of crazy games!And the kicker? His new neighbor in the sprawling Great Elroe Labyrinth was none other than the little spider gal herself, Kumoko!So, what happens when two totally broken characters end up living next door to each other? They team up, duh! Their genius plan? Hit all the poor monsters in the Labyrinth with a two-pronged attack! A good ol' fashioned sandwich maneuver!But Elliot had a little secret. “Heh, sorry folks,” he probably smirked to himself, “but your boy Elliot here? He's playing with cheats activated!”Skill Acquired! [True Man's Slash]!Skill Acquired! [Skull Splitter]!Skill Acquired! [Planetary Devastation]!

Masterpieces such as 'The Divine Comedy', 'The Theory of Evolution', 'Encyclopaedia Britannica', 'The Theory of Relativity'...Born in the history of human civilization, possess mysterious and magical powers in another world!Original sin, biological evolution, mastery of all arts...By reading the secret tomes, one can gain a variety of powers!The only trouble for the people of the other world is that they find it difficult to understand the texts from Earth.At this time, there comes a librarian from Earth...

The youthful Qin Ye was born almost a century ago, but thanks to immortality granted to him by the ‘fungus of aeons’ he can pass for a high schooler.