With Pitch living in the Northeast Building, there will be a number of his Nightmares lurking around and in the building. They're all black horses made of sand with glowing orange-yellow eyes that are attracted to fear/nervousness that come in two sizes, either the standard horse size or roughly small cat sized. The smaller ones will be more prevalent.

They're attracted to fear/nervousness and perfectly capable of inducing bad dreams.

Folks are more than encouraged to use and abuse them for shenannigans! Just drop me a line if you kill one though, they're Pitch's babies and he's a bit overfond of them.