I recommend the two books,"The Infinite Chance of Devouring the Starry Sky" and "The Great Dream Chance System", to you. They belonged to the light novel and fantasy category respectively. They all had huge opportunities and system elements. The protagonist could obtain all the opportunities at home, including mysterious treasures, bloodline potions, the leader of the demons, and so on. It could be said that he was super lucky. If you like this kind of novel, these two books will definitely satisfy you. I hope you like my recommendation, Mwah ~😗