Former General Is Undead Knight - Volume 1, Chapter 21: Lord of Underground Labyrinth?

A once supreme celestial being is reborn in the world of mortals!With the ability to decide life and death in his left hand through his remarkable medical skills,And overwhelming supernatural powers in his right hand to crush everything!Unrivaled in both medicine and martial arts, he roams freely with arrogance!

[The citizens of planet #674589 has been given the opportunity to awaken.]With this abrupt message that appeared out of nowhere, the world as everyone knew it had ended.A series of apocalyptic level of natural disaster washed over the Earth, claiming numerous lives in the process.Every lifeform on earth that managed to survive the apocalyptic natural disaster was given immense power.Animals metamorphosed into terrifying beasts and various plants gained self-awareness, while the surviving humans gained powerful supernatural abilities.Leo, a young man finally left the orphanage, a place he'd called home for his entire 16 years of life. With his dreams of finally breaking free and experiencing adult life outside of the orphanage finally coming true, his world was turned upside down after receiving the message with the rest of the world.Freedom was no longer something given, it now had to be earned. This apocalyptic and ruined world was something that could take kill him in an instant.[Requirements met. First Seal Broken.][Innate skill awakened: Regeneration.]

This isn’t the struggle of an empire, nor the tempest of another world, and definitely not a cultivation story. This is actually a super serious (not really), super hard sci-fi novel about saving the world. Take what I’m saying seriously.(Don’t)

Okay, it’s really just a bunch of slippery leaders and their deceptive emperor having a fun time saving the world everyday.

An unmotivated otaku is transformed into the Emperor of an ancient intergalactic magic sci-fi empire, and with the aura of a stay-at-home dad, he is similar to an uncle who adopts an army of lolis. This is the hilarious story of an otaku and his freeloading army that appeared out of nowhere. Once again, this is a super serious story. This is a super-ultra-serious sci-fi story.

Have fun 😉

- Description from Novelupdates

On modern-day Earth, An Lin seems to have been abandoned by God.
When his father suddenly disappears, An Lin is left with his father’s immense debt, putting his life at risk.
After being forced to a rooftop by his pursuing creditors, An Lin is unexpectedly swept off his feet and brought to the ground safely.

After learning that he was saved by an Immortal, An Lin is gifted, seemingly out of pure generosity, the ‘God Of War System,’ and a pass to a new realm.
Follow An Lin as he experiences a whole new world of legends, meets many new friends, acquires legendary weapons and tools, and starts on his path of becoming a powerful cultivator. There is never a dull time in An Lin’s new life with his ‘great’ new system!

- Description from Novelupdates