All-Mighty Girl Gets Spoiled by A Bigshot - Chapter 643 - Tell the Security Guards To Chase Him Away   

Chi Lang transmigrated to the Middle Ages as a third-rate magician in a third-rate magic academy. His magical aptitude is zero. But he has a good roommate.

His roommate is good-looking.

His roommate is good-natured.

His roommate helped him escape from danger several times.

His roommate never complains.

Chi Lang felt like he liked his roommate a little bit, and then his roommate helped him solve his ‘single’ problem.

It wasn’t until much later that he realized that his roommate was a remarkable figure.

——He was one of the demons sealed by the magician known as the “God of Magic”… And Chi Lang became the one who unlocked the seal of the Demon Lord.

- Description from Novelupdates

After dying from a gunshot, Reo meets the goddess Ophelia who offers him a rare chance. Instead of being reincarnated with no memory of his past, he can come back to a new world with the offer of receiving a legacy as well.Reo gets to choose from six legacy cards, each offering different powers. One card is blank—a risky option with slim chances of getting a good legacy from it. Ignoring the goddess’s warning, Reo picks the blank card and to both their surprise, he gets the SSS Rank Dark Dragon Legacy, a type of legacy so rare that only one human in Ophelia's world has ever had it.Reo is Reborn as Silva, he’s quickly labeled a failure by his noble family because he lacked magical ability at the moment , due to his legacy not yet awakened. His father, embarrassed and harsh, orders his death, but his mother begs for his life, sending him away to be raised by another family in a far-off town.Silva awakens his Dark Dragon Legacy, growing at a rate that was beyond normal, as he tried to understand the task the goddess had in mind for him, while still enjoying his new life.He also made out some time to pay his father back

True evil needs no reason to exist.

“All living creatures must die, but I wont. ”

Once known as the most talented and knowledgeable scholar/philosopher across three continents, he basked in the praise and reverence of those around him. However, tragedy struck one fateful night when he bore witness to the cold-blooded murder of his entire family. Driven to madness, he embarked upon the path of power, the path of negative energy, and thus, The Great Demon, Badur, was born.

In a single day, a mountain of corpses were stacked, many of which fell to his blade. However, during his final pursuit of revenge, he met his untimely demise. His soul was extracted and cast into the void, where it would endure eternal suffering.

However, his jouney would not end here……

“What do you desire?”

A grotesque creature floating in the void asked while staring at the bruised and beaten soul of a young man.

[Ding!! Host has received Void grade Treasure]

[Ding!! Goal has been set : Attain True immortality]

A new lease at life is presented

A deal with a Demon filled with resentment

A new journey, a new Dawn

With that the great Demon, Badur is reborn

ps: the book won't progress the way other novels have been progressing. if you don't like a unique development then maybe this isn't the book for you.