Nuclear-powered Sword Immortal - Chapter 751 - 668: Strike First

Zach was a sci-fi game enthusiast who unintentionally crossed over to a magical isekai. Fortunately, he had access to the previous game system and could fight the magic-savvy aborigines with high-tech weapons.

“Magic? No, I have the lightsaber. ”

Unlike what he expected, the system presented him with a different way of leveling up. He had to get some kind of special energy from the pretty girls' bodies on this planet so that he could unlock his weapons.

“What the hell happened? Is my sperm capable of upgrading girls? Can my blood cause those girls to burst out instantly?”

This was incredible.

The succubi were a hated race in the magical isekai because they oversucked male sperm and killed men, but not Zach.

Surprisingly, the majority of the special energy that Zach required was distributed in succubi.

He appeared to be having a fantastic journey.

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“How many people have you killed? How many families have you destroyed? How many towns and cities have fallen because of you!?”“I don't remember.”The villain whom the main character was destined to defeat at the end of the novel. That was who I had become.There was just one problem...“Why am I a teenager!?”“Why is there a school acceptance letter on my desk!?”

Who says I am a worthless student, the pretty Alliance Leader is within my grasp.

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- Description from Novelupdates

William Valehart was the absolute—supreme god of all existence. He ruled not a world, not a galaxy, but everything. Unbound by time, space, or death, he was omnipotent, eternal… and alone.By his own will, he sealed away his infinite power and chose to reincarnate. Not in defeat, but in search of something more. He boarded a world-sized ship and cast himself into the unknown, embracing mortality.He died—and awoke again.Reborn in a new universe, aboard the same titanic vessel, William finds himself in Urenus, a galaxy far larger and richer than the Milky Way. It’s here that a portion of humanity—just 5 to 8 percent of its population after conquering over half the Milky Way across millennia of war—has arrived through a now-vanished wormhole. Cut off from the rest of their civilization, they’re stranded, under siege, and barely holding out.Urenus is not unclaimed. Native civilizations, empowered by mana and superior numbers, have rallied against the human invaders. Advanced mech pilots are humanity’s last hope—warriors who push past mortal limits—but they are too few to win.That’s when William Valehart intervenes.With fragments of his sealed power awakening and his god-ship still under his control, he saves a human fleet from destruction—and learns of their fragile, desperate stand.He makes a choice.Not as a god who demands worship.Not as a savior bound by duty.But as a force reborn—who will fight beside them, reshape the war, and carve a place in this new universe.Because he can