Hogwarts - Era of Darkness - Chapter 45 – Small Sparks

After all, transmigrators of this era were no simple matter. Some became slimes, others turned into treasure chest monsters, and some were even reduced to mere skull--such things were all commonplace.It was nothing more than playing a villain, Shiayar didn't care. Wasn't it only natural to pay some price to become stronger?[Destined Great Villain System][“Let this world feel the agony!”][Newcomer Mission: Let the young and naive Grand Duke's daughter of the Azure Garden Dukedom, Miss Silvia, experience the betrayal of her loved ones and, amidst the pain and despair, complete her transformation and rebirth.]

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates

She was reborn back to 11 years ago, when everything was fine, her family was still alive and she had not experienced the pain of destruction. Since she had the chance to restart, she decided to seek revenge on those who had hurt her! She would also leverage her knowledge and strength to lead her family to a prosperous life. However, she has a regret: despite being reborn, she still ended up marrying him, a man who was difficult to approach...

My name is Qi Yuan, and I am a time traveler who now holds the esteemed title of the eldest martial brother at Seven Colours Peak. I am armed with a game jade slip capable of connecting realms across the heavens, and blessed with the ability to unveil hidden information through my discerning eyes.[A seemingly ordinary blade of grass reveals secrets of a clandestine meeting between True Man Ku Mu and Empress Dashang that transpired just three days prior.][Her name is Ruan Yixi, who appears to be your beautiful master on the surface, but she may have a deeper connection, perhaps she is even your wife.][This is Heavenly Dao of the World, a Spiritual Object renowned for its significance in Foundation Establishment][This is a lifeless planet, a potential vessel for the creation of a Golden Elixir].So my road of cultivation turns gradually strange.“Heavenly Dao? A Spiritual Object for Foundation Establishment?”“So many desolate planets, all refined into Golden Elixir!”The Heavenly Dao is used as the foundation and refining stars into Golden Elixir.I am Qi Yuan, I become the origin of all things.My name is Jiang Lingsu, a fellow disciple at Seven Colours Peak. My Senior Brother is mentally ill.He is never focused on work. Nor does he like cultivation. He only loves simulation games.Senior Brother says, “Playing games is like cultivation. It can also create a world.”One day, there is one more sun in the sky.I ask him what it is, he says, “That is my Golden Elixir!”This book is also titled 'Cultivation: The Jade Slip's Universe' and 'The Golden Elixir I Cultivated is a Planet,'