Seirei Tsukai no Blade Dance - Volume 16, Chapter 4 - Desert Voyage

The summer I was 17. A painting I created was sold. For 1.4 billion won.

With the Legendary Mechanic System, I transmigrated to Marvel Universe to be Dr. Zola’s assistant.

With Mechanical Force Analysis, I can learn every black technology.

Winter Soldier’s arm? I built a better one for you.

Iron Man’s armor? I already made it a decade earlier.

Doc Ock’s tentacles? I am the one who provided core technology.

Hulk’s mutation? Sorry, I was there and got hit by the radiation too.

As for a certain purple potato, can he collect all Infinity Stones?

……

However, I only had one simple ultimate dream. That is to go home…

- Description from Novelupdates

You’d think seeing the future would give me a head start on surviving the apocalypse. I had it all planned—until everything I knew shattered when my husband sacrificed himself to save me and our son. Now it’s just me, my three-year-old son Leo, and my cursed gift of foresight that only seems to kick in when it’s nearly too late.I’m doing my best to keep us safe, to find food, to make some kind of plan—“Mommy?”I glance down, trying to ignore the tug on my pant leg as I focus on our supplies. “Not now, Leo. Mommy’s thinking.”“Mommy!”I sigh and finally look down. My three-year-old is standing there, clutching… I blink. “Leo, where did you get a knife?”He shrugs, grinning like it’s the most natural thing in the world.My heart stutters. “No, really. Where did you find that?”I try not to laugh. I mean, he’s three. Maybe he just—found it somewhere? But the next day, it’s a water bottle. Then, a tiny flashlight, somehow with batteries still inside.I don’t even know what else; he’s pulling things out one by one with the pleased grin of a kid who’s just figured out his favorite game.Well, we may just survive this mess after all.Now, if only the universe could have spared me from him. I don’t even know his name, but I know his type: tall, broad, and annoyingly handsome, with an air of calm control that’s out of place in this chaos. Ex-military, if I had to guess, with a voice that’s just as infuriating as his smirk. The man has a habit of showing up at the worst—or best—possible times, with a gun at the ready and secrets buried as deep as those bright green eyes.I mean, he’s probably useful, but I’m trying to keep my eyes on the prize here: survival.For Leo and me.Because, foresight or no foresight, nothing is guaranteed in this new world—except the fact that people like him are trouble.

There was a mysterious old man who approached the failed swordsman with the “100 million years button”. A magic button which can achieve the same effect as training for 100 million years if you push it.

The failed swordsman who pushed the button had his doubts, but immediately felt tremendous power rising in his body. So he pushed the button many times.

However it was a cursed button. The moment it was pushed, he was confined to the 100 million years prison of time. The first 100 years were devoted solely to training. After 1000 years he had forgotten why he swung his sword. He stopped thinking completely after 10,000 years had passed. After 100 million years he became crippled and finally managed to return to the real world. At the same time losing all his memories from the past 100 million years, the only thing that remained were his sword techniques. “I can become stronger just by pressing the button!” or so he thought and pushed the button many times after that. Foolishly trapping himself in that 100 million years of hell each time.

As he continued this loop, he began to think “If I destroy this world, will I get out of here?” A few billion years later, he finally escaped from the loop.

This is the story of a failed swordsman trying to make a name for himself in the world.