MTL - Marvel: Start with Summoning the Shadow Troopers - Chapter 180

An unrighteous and a cold hearted man. a villain who struggled from the bottom to the top of society. to overcome his foes he chose to be ruthless and immoral.In a world full of cruelty Jon Hardy had no intention to hold back.A story of a man who traveled back to 1945 equipped with his knowledge of the future and his profound wisdom, Jon Hardy is determined to pursue his ultimate goal once again.

In the ruins after the war, the empire is reborn from the ashes.For supreme glory, it competes for supremacy in the world and aims to dominate the globe.

Born into a world of chaos and violence, young shapeshifter Rhishisikk struggles to survive. With the assistance of unlikely allies, he must learn to live among the most dangerous of monsters – human beings!

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