The TheoRgs are known for being amongst the biggest, toughest, and most generally unpleasant sentients in the galaxy. And this is their nightclub.
During a storm the PCs come upon a little boy that plays in the rain. Upon further inspection they discover that he has one eye and a long tongue lolling in its mouth. Spit dripping. It is a demon from beyond that can access our realm during storms, it eats all heads that are not its own, living and dead.