Harry Potter: Eclipse. - Chapter 50:

There was a turtle here,He was a bandit! A robber! A shameless scoundrel!Don't mess with him!

Jiang Bai woke up one day and found with shock that he had transmigrated to a parallel world that is similar to Earth. There, he was granted a cheat system to help him forge the path of a tyrant in this new world. He was now stuck in this parallel world body, the body of a weak and cowardly person. Join Jiang Bai as he rose to the top in this new world!

- Description from Novelupdates

After getting shot, Lucas, a serial killer, reincarnated into the novel world as a tragic villain with the same name, Lucas Ciffer.

Lucas Ciffer was supposed to be the Holy Kingdom's successor to the throne, but his demonic appearance and the powers he possessed terrified the entire kingdom. A white-haired boy with red eyes and pale skin, together with his dark powers, got persecuted and exiled by his own family. Not to mention that in the future he was destined to die by the hand of the hero.

Lucas fell from holiness, and, with the serial killer's bloodlust and knowledge of the future, he decided to prove the world right.

Yes. I could be a villain; no, in fact, I WILL BE THE VILLAIN.

“Will you marry me?”As a metaphysics master, An Yan was humiliated by a rejected marriage proposal.She turned around and grabbed the man with the best fate in the entire room to propose to him.“Miss An, you'd better not regret this!”In the blink of an eye, the hunter became the prey, and An Yan was a bit panicked.She was truly cherished, but it was a possessiveness-driven affection that An Yan did not want.It wasn't until he fell ill.That she realized what was called deep affection was just a conspiracy.Everyone says he is the Li Family's deity! Because of him, the Li Family flourished with riches and glory.In reality, he is the Li Family's demon! He could potentially drag the entire family to irreversible doom at any moment.