"Well, I know in the last book we solved all the problems by chucking the magical rock into the ocean. But wait! I need to write a sequel! Hang on, I know. It wasn't just a magical rock, it's actually a rock full of gods! And we need to have the characters go back & fish it out of the ocean and carry it around some more so they can use it to very unethically yet gleefully slaughter their enemies and enable the extinction of species! Yeah, that's it!"