I recommend the fantasy novel,"Sign in with the Sacred Body of the Ancients at the beginning of the game". The main character, Jun Xiaoyao, transmigrated to an ancient family and became a divine son. He had an invincible background and amazing talent. He also obtained the check-in system and signed in a Sacred Body of the Ancients at the beginning. They could obtain various powerful rewards and abilities by signing in to different places. In the end, he would become an existence at the peak of perfection and command the world. The main character is invincible from the start and has a super powerful background. It fits your needs very well. I hope you like this fairy's recommendation. Muah ~😗