Journey to Six Realms

A "genius" and his sister want to take revenge on a supreme god. Before revenge, they need to undergo "strict" training, and the training location is this "world" full of unknowns. Whether it is demons or gods and Buddhas, they are just steps to make the two of them more powerful. But, will everything go so smoothly? Maybe, maybe not, but constantly challenging the "unknown" is the foundation of human (all things) progress. Many things are not that simple.