I Alone Level-Up (Web Novel KR) - Chapter 110

The notorious imperial court lackey and the meritorious military general were well-known for their mutual dislike, a pair of arch-enemies set in stone. Who could have foreseen the unexpected change in the winds of heaven: the general injured on the battlefield, both legs disabled, and even forced by the emperor to marry his nemesis.  

With one marriage edict, two people with mutual hostility are forced to marry and live under the same roof. Yet after these long days together, they come to the realization that this fellow is not truly devoid of any saving grace/unattainable and high out of reach.

- Description from Novelupdates

A high-ranking officer in the Marines and a master of both Western and Chinese medicine, Feng Yu Heng is transmigrated with a duang sound to the Da Shun Dynasty.

Lin Yuan took a ‘Gate to All Realms’ and traveled to the vast universe of the Star Sea.

The most powerful person here can destroy the starry river system with a snap of his finger, and tens of millions of light years are coming in a blink of an eye.

Lin Yuan, who has been reduced to the bottom, can only rely on the ‘Gate of All Realms’ and the bound talent ‘Heaven-defying Comprehension’ to travel through all realms and become stronger silently.

[You have incredible understanding, practice the Yi Jin Jing, and understand the ‘Yi Jin Jing, body exchanging blood and quenching the gods’]

[Your understanding is against the heavens, you understand the thunder in your palm, and understand the ‘Thunder Creation and Development Method’]

[Your understanding is contrary to heaven, watching the birth and death of the world, and realizing the ‘world in the palm of your hand’]

[Your understanding is contrary to the heavens, you have studied the art of incarnation outside the body, and realized the ‘Great Law of Self-Transformation’]

…

As he traveled back and forth again and again, Lin Yuan grew stronger endlessly, until… he was invincible in the world.

- Description from novelbuddy

Taking a quick peek into life on normal planet earth, a vicious alien race called the Xollante attacked the planet with their nuclear weapon. But that's not the story...Shortly before the alien attack, the story was based on an orphan boy named Leo Rayden who somehow discovered that he possessed interstellar communication ability. With this ability, he communicated with a being from a planet friendly with Earth. The being told him that he must warn earthlings of the attack from the Xollante race. But Leo saw himself too young and too weak to carry out this assignment. So, neglecting the warning, the Xollante finally arrived on Earth's atmosphere and just like that, Northern Earth became destroyed... The Space Guardians of Earth couldn't stand the almighty Xollante fleet.And to make matters worse, Earth's core became weak and split.But that is still not the story...A second era now was set in place after the nuclear attack. Earth became split from the core after the nuclear attack and slowly, the Northern and the Southern part of earth started drifting apart. The wild Xollante race occupied the North, while the surviving earthlings occupied the South.But now Earth must do everything to destroy the Xollante race and send them away from the planet. And that was when another scheme was set.Earth had discovered a Lone and barren mutant planet called Luxus which gifted earthlings with superpowers. Humans call these superpowers “Quirks”. So, for the grand scheme, Earth's authorities started sending men and women on the planet to become mutated in readiness for the huge war that was looming against the Xollante. Earth was now full of mutants, and soon enough, non-mutants became outcasts in the society. The system only favoured the powerful and scorned the weak. And that was when Leo woke from his coma of 78 years on planet Luxus.And this, guys, is where the story starts...Leo managed to survive the nuclear attack with some strange hidden quirk he didn't know he possessed. When he opened his eyes 78 years later, he was on planet Luxus, being taken care of by his mind communication partner, Loca. But there was no time to frolic. He has to get back to Earth and try to rediscover that powerful quirk that saved him from the nuclear attack. To do this, he must attend Earth's quirk academy to learn all he needs to get stronger. He knew somewhere within him lies the most powerful quirk ever in existence, and his only aim is to rediscover it. He must become stronger, beat earth's power system and one day help the top earth Avengers fight off the Xollante race.But first, he must overcome every obstacle thrown at him from his fellow Earthlings and fellow mutants before he could even think of fighting the aliens.He must attain the highest rank level possible to atone for his sin as a child for not saving Earth when he was informed.His guilt being the major drive, he soon found that the highest rank was within reach of him, but can be pay the price?This story incorporates the use of hi-tech weapons and ancient weapons, and the use of acquired quirks to wield these weapons to victory. It is truly a story about weak-to-strong, action, survival, mutants, adventure, academy and superpowers.A mix of sci-fi and fantasy, yes.And yes again, local beast weapons have been smuggled into sci-fi. Let's deal with it.