Unseelie Nymphs, on the nasty side, definitely.
Gutpuppets! The hip new replacement for zombies! They're fast, have a
nasty poison (2 DC 17 Fort saves. At CR 3. And by the way, that's just for the 1st round. It's 3.0, so the 1d8 points of "permanent Strength damage" would most likely be Strength Drain, which is along with 1d10 points of damage and potential Unconsciousness.
Oh, and a standing pool of that poison does what looks like 1d10 points of Strength
Burn. Yes, you heard that right.), which is described as literally liquefying flesh. And if they come across a corpse, they hide in it, then ride it around, while sweating that poison.
Why, oh why is that a CR 3?