Start with a Yandere Vampire, Magic Evolution Theory

Traveling to the Middle Ages, the era of primitive magic, an era of backward magic theory and crazy development of everything, Lin An was reborn as a marginal illegitimate child. This is an era of occult science, herbalism, divination, black magic, exotic animals, and magical engineering theory. In this era where everyone is talking about curses, monsters are regarded as strange powers, magic is regarded as weapon power, and alchemy is regarded as a lottery era. Colvin uses his modern self to construct everything in this world. In this life, the source of motivation supporting him is no longer wealth, power, women, and status. It is the deepest and most secret curiosity deep in the human heart to understand this magical world. In his own way, he told everyone in this world that magic cannot throw dice.