MTL - Billion Technology Crystal System - Chapter 8 : X system was born!

Alex was an ordinary teenager—until the day he discovered his ability to drain energy from the dead. With powers rooted in death itself, Alex hides his necromancy behind a normal life, secretly entering deadly portals to fight monsters and earn money. But beneath the surface, a darker truth lingers—his parents's death and his powers are linkedAs he harnesses his necromantic abilities, draining the fallen to grow stronger, the weight of his power begins to take its toll—and the line between the living and the dead starts to blur.With enemies closing in and betrayal around every corner, Alex must master his growing abilities before they consume him—or worse, before the forces hunting him claim everything he has left.When death becomes your greatest weapon, how long can you survive before it turns against you?---

An alien race invaded the Earth on June 6, 2128. At the midst of this war, many nations allied with the alien threat and the war nearly wiped out the rebelling humans of the planet. At the edge of mankind's survival, the United Nations Army launched its forces to eliminate the immediate stellar threats that loomed over Earth.

General Seeker Carlean, commander and leader of the mission, risked and gave his life to destroy the immediate stellar threat. The battle was won though Earth lay in ruins. Perhaps mankind will live to see a few years of peace before the alien threat returns to wipe out their existence.

At the immediate aftermath of the stellar battle, the fallen Seeker Carlean awakens and finds himself at aged 17, living the peaceful life he lived 16 years before he died.

So begins a new game in the battle for humanity's survival.

An orphaned boy with dreams of making it big through being a blacksmith is given a once in a lifetime chance to succeed when he's taken in by an odd pair - Eggor and Ella. While former teaches him the arts of craft, the latter teaches him the mysticism of cultivation, granting him two paths to tread in this life.

Nanaya traveled to the Naruto world and survived the Uchiha genocide incident.As long as he sleeps, he can become stronger and invincible.After accumulating 60,000 hours of sleep, Nanaya opened the Sharingan and activated the ability of the Ice Fruit.Itachi: I didn't find his existence on the night of the extermination. Who is it?Sasuke: Nanaya, my Amaterasu's black flames can burn all visible objects, otherwise they won't go out.Next second!“What, Nanaya, you guy, actually froze my black flames.”Pain: That guy just slept for a second in the gap between Shinra Tensei, and the power to wake up is above me.Madara: I can't dance in front of that man.Kaguya Otsutsuki: My world of ice can't even live up to that sentence, ahhhhh!Uchiha Nanaya, with a pair of Mangekyo Sharingan, changes the past and reverses the future.