1 Prologue

Due to an unknown reason, seven ancient beasts emerge from out of nowhere and wreaks havoc in the world. Each of these ancient beasts is the personification of the seven deadly sins which are; pride, wrath, envy, sloth, greed, gluttony, and lust.

At the emergence of these seven ancient beasts, the world falls into chaos and humanity was in the threat of going extinct. When there is seems to be no hope, a miracle happened as many individuals with amazing weapons had appeared to fight against the beasts created by the ancient beasts.

There were many of them holding weapons of different sizes and shapes, but there were only seven individuals that shined among them, and each of them has the weapons that are the only things that can kill the seven ancient beasts.

The seven ancient beasts are; the Dragonlich which represents the sin of wrath, the Scarlet-Mane Gold Lion which represents the sin of pride, the Nine-Tailed Demon Fox which represents the sin of greed, the Violet-tattooed World Bear which represents the sin of sloth, the Nine-Headed Serpent which represents the sin of envy, the Astral Phantom Goat that represents the sin of lust, and the Heaven-Devouring Boar that represents the sin of gluttony.

These seven ancient beasts all appeared out of nothing with only one thing in their minds, which is to destroy humanity. This cannot be done with just them so they created different beasts from a portion of their own powers.

Against these beasts, normal weapons won't deal any damage so that is where Zetrons enters.

Zetrons are a special kind of weapon that is the embodiment of a human's soul, will and spirit. Which means that every human has the possibility to have their own Zetrons that are unique of its own.

Except for seven Zetrons that are the only ones that would be able to kill the seven ancient beasts. For these Zetrons will choose on their own to whom they would be together. It sounds like a love story but it's not since Zetrons have no sentient, only instincts.

And one of the seven lucky humans to be chosen by these Zetrons was Nicholas Rinnegan. Which was chosen as the host of the strongest of the seven strongest Zetrons.

The Dragon Sword of Wrath.

A Zetron that can kill the Dragonlich or the other ancient beasts. It had chosen Nicholas to be its host due to an unknown reason that he did not even know. The same can also be said with the other Zenons that was chosen by the other six Zetrons.

Zenons are humans that have Zetrons or can wield them. They have the capability to break through human limitations and fight against strong beasts. The only reason that humanity was able to persevere for about a hundred years.

Because Zenons are able to break through human limitations they were able to live longer. While those that wielded the seven legendary Zetrons are able to live longer that make them look like immortals.

While Nicholas is completely different since he was literally the immortal one. It might have been because of his Zetron but Nicholas is the only immortal Zenon, not like others knew.

Nicholas and the other holders of the legendary Zetrons fought against the seven ancient beasts. The there battle was long and hard as they hardly have rest for the next hundred years.

The first ancient beast was slain at the cost of one of Nicholas' comrade. After a few years, another ancient beast was slain at the cost of another one of his comrade. As the years pass by, one ancient beast after another was slain. And the same can be said to his comrades.

Nicholas watched as one by one of his friends due in front of him. He watches hopelessly as they slowly close their eyes with a smile on their faces. After killing the final and strongest ancient beast, Nicholas finally had time to rest.

With the book 'Infinitron' on his hand which has fallen out of the Dragonlich's disappearing body. It was a very mysterious book that had merged with his body after picking it up, he found out that there was a lot of knowledge in the book.

It was about the skills, forging, rune carving, pioneering, alchemy, beast taming and many other things. But what really made him surprised is what he found out about the ancient beasts.

"A thousand years after, the beast will appear to turn the world into ash."

It means that the seven ancient beasts will once again be reborn after a thousand years that pass by. And since Nicholas already knew what would happen he has a lot of time to prepare and understand more about the book 'Infinitron'.

~.~.~.~.~.~.~.~.~.~.~.~.~

A thousand years is a lot of time for a lot of things to happen. There were six individuals that inherited the Zetrons of the other legendary Zenons. Then they have their descendants that would also inherit the legendary Zetron.

Unfortunately for them, the strongest Zetron, the Dragon Sword of Wrath had never appeared again. There were rumors saying that there was still no worthy human that the Zetron has chosen.

The beasts created by the ancient beasts were still present up to this day and strange structures which they call dungeons have appeared. Thanks to the Zenons these dungeons did not pose any threat.

Year 3805

Ten years before the prophesied reborn of the seven ancient beasts. Nicholas once again came back to take down the seven ancient beasts but before all of that, he will have to find a way to convince the others which will be very hard considering his still teenager look.