The protagonist of this book is the culprit who caused the system to collapse by cultivating a sacred beast. He transmigrated to a world that needs a magical beast companion. The protagonist, Fang Shi, continued to do his old job and opened a pet shop that never renovated its storefront. Although this book is not entirely based on the Priest System of Dragon Valley, it has the attributes of a game and a game. The main character also has other class templates, which should meet your needs. I hope you will like this novel.