Naruto: The Strongest Kakashi - Chapter 12

In a world where martial artists reign supreme, strength is everything. Unfortunately, that logic doesn't apply to a certain Florida Man.

Refined in the nuclear fallout wasteland, Leo was the strongest mutant alive. He carried an alien artifact, allowing him to exchange his lifespan for modern items. After 50,000 years of solitary life in a humanless world, he collected enough lifespan to transmigrate to another habitable world.

Leo was later thrown into a mysterious planet. He soon discovered that his body produced radiation, and it mutated the surrounding plants and grasses. Worrying that he might ruin the beautiful planet, he chose to live in seclusion.

Unfortunately, the local population soon discovered his existence, and a misunderstanding ensued.

Vincent Strider was a gun for hire who made a living by killing whoever it was his clients wanted dead. But during one mission, he died in a fierce gunfight. However, death was not the end for him. Vincent found himself reincarnated in another world, facing a floating interface that flickered before his eyes.[Synchronizing Host!][Military System initializing.]Vincent found out that in this system he received, he can summon soldiers, tanks, aircrafts, and even warships! This is going to be exhilarating.

The world ended, and from its ashes, a new society rose. One where strength was law, and the weak were nothing more than dust beneath the feet of the powerful.Malakai Von Sanguine was meant to be great, a direct descendant of one of the grand families of the dome, the Sanguine Clan. But at seven, he lost everything: his parents, his future, and his ability to evolve. Branded as worthless, his life became a living hell, forced to survive in a world where the unevolved were walking corpses.But fate wasn’t done with him yet.One fateful encounter changed everything.He evolved.What he acquired was something far beyond the limits of his clan, something most wouldn’t believe possible. A power that defied the very laws that governed their new society.Now, there is only one goal: revenge.The people who took everything from him… he will hunt them to the ends of the earth. He will burn their names from history and carve his vengeance into their very bones.No mercy. No forgiveness. No escape.They will die screaming.Or he will die trying.

After the nuclear warfare, massacres started to spread throughout the entire world. The order between humans completely collapses, and the strong eats while the weak gets eaten becomes the #1 rule.