MTL - Naruto Lineage Theory? Trash - Chapter 44

However, he did not know that he was not raising just a harmless pet, but a biological weapon secretly made by the government… a real monster.

As a former librarian, Rand felt that he had been living an ordinary life, the one that he had reclaimed unconsciously every single day.

Recently, he has been a little upset because the pet fish he accidently brought home to raised seems to have undergo some strange changes

Well, it turned into a merman.

- Description from Novelupdates

One day, spatial tunnels opened in the very fabric of reality, connecting Earth to a planet that came to be known as Xavier, a planet that has a lot of deserted settlements belonging to the civilization that lived on this planet before we started exploring it.

Each settlement not only hides a secret of its own but also treasures, knowledge, and unthinkable technologies.

In this new world, magicians rule the world and make the rules.

They are those who can contain magic energy, an energy source present in Xavier, in their bodies.

This energy is used to mainly empower supernatural cells.

One can get them by consuming evolution materials.

These supernatural cells suck magic energy to manifest one's superpower in the real world.

Elliot, once the son of magicians in the channel opening stage, now lives the life of an orphaned and poor boy.

Elliot is the weakest magician to ever exist in the world, a world where the strong are respected and the weak are disdained.

With the death of his parents, the ones who used to look down on his has no reason to control their feeling.

With a dim fate ahead of him, he grits his teeth and silently moves on to the day the light of glory shines on him, setting him apart from others in a single day, letting him taste what it means to be God!

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

When you're reborn as Jorah Mormont you ain't got much. A Dad looking to bale and go spend his days hanging out with the guys on the Wall, a wild Aunt raising your wild cousins you can't stand, an arranged marriage to a girl you never met with a dowry almost low enough to be an insult, and a populace of smallfolk so inebriated and incompetent its no wonder nothing's changed around here in 8,000 years. Hopefully the gold finger granted by Levid's Magically Wheel of Reincarnation can help.A really nice pair of testicles.With that, the right attitude, and a shovel I have everything I need to dig a nice grave to lay in.Or Bag End. Let's see which happens first.