MTL - World Destroying Demonic Emperor - Chapter 17 Oshiro Gakuin

A master assassin transmigrates into an interstellar era.

Other players were responsible for competing in the e-sports arena, while he was responsible for stringing up and beating up the other players.

His sword was hidden during the peak of day, and he was a gentleman who arrived in a flash of light;
As a vanguard of the eternal night, he was the variable between life and death in the world.

“As you know, the Star League’s difficulty levels are arranged in this way:
Paradise < Simple < Normal < Difficult < Nightmare < Hell < [Tyron Odin]”

- Description from Novelupdates

What does it mean to be invincible?

Many Sword Gods exhaust their entire lives attempting to cultivate a single supreme sword intent, yet Yang Xiaotian has cultivated fifteen!

For millions of years, no one has been able to cultivate the Primordial Heaven Destiny, but Yang Xiaotian has cultivated fifteen of it!

Throughout countless eons, no one has been able to cultivate the Primordial Universe Holy Fruit, yet Yang Xiaotian has cultivated fifteen!

Across the vast expanse of time, only the rulers of heaven and earth could cultivate the Eternal Divine Body, yet Yang Xiaotian has cultivated not only the Eternal Divine Body but also the Primordial Heaven Destiny Divine Body, the Primordial Universe Divine Body...

What happens when you transmigrate to Beast World? With the system in hand, the world is for your taking! One day, Su Tang, an intern at the hospital, is struck by a system and transmigrates to Beast World. It’s a wondrous world with winged tigers, fire-spitting birds, and enticing man-eating flowers… Everything in this world leaves Su Tang awestruck!

After the Chief of Winged Tiger Tribe saves Su Tang, she learns how backward this place was. Su Tang is determined to help change the world! Under the system’s guidance, she helps to extract salt, build homes, dig traps, make weapons and store food for winter… And perhaps even save the world while she’s at it!

I finally managed to kill the demon lord.