Next to enter the fray are the ever are the ever mysterious Shadow People. This may seem a little lame, adding 'shadows' as a legit entry to the countdown, but shadowy figures have been a source of terror since the dawn of time. That fear of the unknown; what that shadow may belong to, if anything at all! And given the very prevalent existence of "Shadow People" in paranormal studies, I really felt they were something that couldn't be overlooked. Plus I like how it came out!
Shadow beings are another group of creature that lend themselves almost exclusively to being monsters and nothing more, no one had to die to make them and if they did they were a very dark or tortured soul. Shadow People are usually much more intimidating beings, typically with much darker roots and they range from actual threats to just annoying assholes. Regardless, an all around good shadow folk probably doesn't exist.
That's really all that can be said, as expected, most facts about the shadow folk remain in well... shadow!