Almighty Father System - Chapter 24: Gifts & Opportunities.

[Trait: Protagonist's Desire][Acquire one trait possessed by the protagonist you reincarnate into.]A killer physique, a hypnosis app, becoming a shota...The protagonist has gained the ability to reincarnate into characters from adult games and make their traits his own. NO NTRRomance | Fantasy | Harem | Multiverse | SMUT | R18 | Reincarnation | NTL

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

A cauldron, a secret forging method, and his blood created an ultimate weapon. The youngest Sword Crafting Master on Earth had been reborn from another world. With the Nine Yang Divine Furnace and a scroll of Divine Equipment, he was like a fish in water, standing at the pinnacle of the martial way. There were tens of thousands of clans, billions of cities, and countless experts. He was the master of ups and downs!

The Prea gods, who saved humanity from living as slaves to other races and established the human empire, passed down their bloodline. Those who inherited their blood were born with magical talent and could become wizards. After thousands of years, the empire fell, and the world became ruled by great masters across different regions.He was a young man who grew up with his mother, never knowing who his father was. Though he possessed tremendous magical abilities, he lived as a shepherd in a rural village. Now he ventures out into the world to discover the secrets of his bloodline.