Magic Forums

I been and am dealing with some creatures that are a little taller than normal humans size ,they are really fast,their body is fully black and dark and their face looks like they are wearing a mask with no eyes and mouth the mask is fully white or... and they usually used to attack me while I was asleep and I remember I heared some laughing voices in a dreams while there was someone running being my body were they shadow people? If not what are they