Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 565 - 564: The Earth Immortal Monster is Here, The Earth Immortal Monster Explodes

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates

On a certain day, Ji Xiao Li led his newly-acquired disciple into a dungeon, feeding him all sorts of priceless red and blue potions.

Teammate: f*ck, tyrant, you have an ore mine at home?

Ji Xiao Li: how did you know my family owns an ore mine?

【Teacher Orders a Salute：disciple, enter the sect, accept my guidance. Tell teacher, what is the sect’s foremost teaching?】

【Milk Tea Small Crisp：Master, isn’t our sect just you and I, what is the foremost teaching?】

【Teacher Orders a Salute：evil, evil disciple! I said to say it so say it!】

【Milk Tea Small Crisp：……】

【Milk Tea Small Crisp：Beat to death YueJian Chunhe that son of a bitch!】

YueJian ChunHe = Milk Tea Small Crisp = Ruan Fenghe

Teacher Orders a Salute = Ji Xiao Li

- Description from Novelupdates

Li Xuan traveled through the world of immortality and opened the apprentice system, and both apprentices and apprentices could be rewarded for upgrading.

【Ding! Accepting apprentice Qin Yue, reward you: Innate Divine Power]

【Ding! Accept the apprentice Zhao Tian, ​​reward you: call the wind and call the rain]

【Ding! Apprentice upgrade, reward you: space shuttle]

….

Li Xuan, who accepted a bunch of apprentices, evolved infinitely in seclusion.

Ten years later, the Devil Emperor invaded and wanted to sacrifice the whole world, but no one could stop it. The disciples watched the world fall into despair in pain.

At this time, Li Xuan appeared and slashed a sword against the Demon Emperor under the watchful eyes of the public.

Boom!

The sky fell apart, the invincible Demon Emperor fell on the spot, and the entire dark world was swept away by a sword.

The disciples were horrified. It turned out that the strongest person in the world was actually the master who had been in seclusion for ten years.

- Description from novelbuddy

Suzuki, an adult programmer, suddenly notices that he’s been thrown into a different world while wearing a casual clothes at level 1. He gained high levels and treasures after using the 3 times use-disposable-magic, Meteor Shower, once. After that he intends to do different world “sightseeing tours”? He meets 3 beast girls, beautiful purple and black haired sisters, and an eccentric blonde haired elf girl along with various people during his trip. Although there are occasional fighting with demons and demon lords, this is a heartwarming fantasy story at heart.