Kujibiki Tokushou: Musou Hāremu ken - Chapter 270

Soaking in lava, sleeping in an Ancient Killing Formation;

Traversing alternative worlds in a heavy armored vehicle;

Riding a Gundam Sentinel and slaying immortals with Godzilla...

I got myself a stat system, and from then on, I only beefed up my defense!

I just can't help it, I'm afraid of pain! The Daluo Golden Immortals of other worlds are all really fierce, and all of them know super ultimate move with infinite power. They have little meetings every day to discuss how to break through my defense.

I really don't know why they're so obsessed...XD

On December 11th, the apocalypse began. A new, mutated coronavirus—the Zeta variant—spread worldwide, and it was far more deadly than any version before it. Those infected without strong immune systems turned into zombies, and within two days, chaos reigned, wiping out 80% of humanity.Zack, an ordinary guy, found himself in the middle of this nightmare, struggling to survive. Lacking the skills to fight off the zombies, he was soon overwhelmed and met a tragic end… or so he thought.When Zack suddenly finds himself alive again, he’s back at the start of the apocalypse but with one huge difference—an advanced AI has armed him with powerful technology. Equipped with a zero-point reactor, power armor, a super serum, and much more, he now has the tools to turn the tide.Follow Zack as he builds a new civilization from the ruins and fights to reclaim the world in this thrilling journey of survival and innovation.

Traveling to the wizarding world, Eli found that he was an Eternal.

Life is infinite, life is immortal.

“What? The talent is very poor, then I will meditate for ten years, centuries, and thousands of years, and I can always meet the promotion requirements.”

“This skill is hard? Oh, let me study it for decades to see if it’s really that hard?”

“Consuming life force, improving mental force, and this kind of good thing.”

“The enemy is here? Oh, let me find a place to hide for a thousand years, until his lifespan is exhausted and his mental power dissipates, and then I will come out again, free and endless void.”

…

This is the story of an immortal who lives in the wizarding world and then kills the endless world.

- Description from novelbuddy

In a galaxy far away, there is a kid without innate ability to practice internal techniques. So, in order to gain the respect of his father, he resolutely chooses to follow the more difficult and painful path of practicing external techniques. As the years go by, he grows up, but what really changes his life is a mysterious meteoric crystal stone – the Meteoric Tear. This stone fuses with the young man’s body unnoticed, and he seems to undergo drastic transformations as a result. After that, everything is changed. Eventually his father knows that the son for whom he hasn’t really shown a lot of consideration possesses astonishing abilities. And there’s a lot more to come.