Becoming evil makes you ten times stronger, but becoming a demon gives you hundredfold strength - Chapter 501 - 374 Bah, Shameless

John Browning, a former underworld assassin, went to attend his friend Angele’s wedding party but ended up meeting his former colleagues. Before he could think that the whole wedding ceremony was a setup to catch him, he felt dizzy all of a sudden!

At that moment, he knew that his lifelong friend had already betrayed him and sold him out. John was humiliated in front of hundreds of peoples and was forced to kneel in front of Thomas, the underworld assassin organization leader.

Within a few minutes, they beat him brutally, dragged him to some underground basement, and then locked him in a gloomy room.

John felt bitter when thinking about his friend’s betrayal. He laid on the cold floor for two days and died miserably. But his story didn’t end there.

…

In a world filled with magic and mystic powers, John Browning woke up in an 18-year-old boy’s body. Before he could open his eyes and see his current situation, he felt someone was dragging his body.

'How am I still alive?' He got puzzled inside.

But after a few seconds, John learned from the young boy’s remanent memories that he was transmigrated to a mystical fantasy game-like world filled with magic and mystic powers!

A legendary powerhouse of his generation, tired of the bustle of the peak, returned to the ordinary city and started a new life as an ordinary teacher. He wrote the legend in the city.

Magnificent mountains and rivers, the rising powerful ones. Some ancient martial art masters stood at the peak, becoming legendary. Some financial crocodiles rose up in the minuscule places, laughing arrogantly.

However, watching the school beauties was better than fighting and killing; educating was better than fighting for fame.

- Description from Novelupdates

2000 years ago a catacalism happend that changed everything, a mystrious type of enrgy called Ena was introduced to this world causing a wide spread mutation in animals and plants creating many bizzar new species every single organism changed and that included us humans as we gaind the applity to harness ena transforming us from mere mortals to super humens but the tiping of the pyramid was sudden and even with ena cultivators being born humanity could not stope the mutated beasts invasion, falling from the top of the pyramid as an apex predator of this world to a prey at lowest leveles of spectrom, 90 percent of the humen population were wiped out that was when someone discoverd that he could tame these beasts and use them to fight and grow stronger at a speed that seemed impossiple for any ena cultivatior saving what was left of humanity and curving a small pice of land as a sanqutary for the suvivers, those heros where called beast tamers and thats how this honoroble profisson was born.Waking up in a new world, Alan Ortex finds himself thrust into a bizarre and very dangerous new life. With a new family to protect and the desire to face the unknown, fear and excitement bubble up inside him. He will start his journey across the multitude of encounters that he will find in this new life. From a weak high school student, wondering and wanting to make a name for himself, wanting to enjoy his life to the fullest, as he promised himself on the first day he woke up in this new world. In this world full of bizarre creatures and beasts and unbelievable superpowered humans, he will become the strongest beast tamer ever—the absolute one.It's a tale of life, a journey into the unknown full of trials and one big mystery unfolding after another.Stay on your toes; it is going to get serious.

The strongest Demon Lord dies, and reincarnates as a human. Not only that, he because of various incidents turns into the hero’s best friend.

Follow his journey as he tries to help the hero escape his fate, and on the sideline to conquer the continent while he’s at it.