Alien Robots
Soon, we arrived at the tall tower with the massive serpent carving hanging on the exterior. It was extremely tall and wide as expected, but the insides were cleaner than what we initially had thought. We thought it would've had tons of dust inside and filled with cobwebs, but surprisingly enough, it was pristine.
Within was an entire library of books, recording the history of the riversnakes and how they eventually evolved and developed human forms. It also recorded the invasion—or at least, what happened up until the final battle that decided the fate of their race. They had mustered up all of their forces for one decisive battle with the Hex, and… well, were promptly wiped out.