I like undead and I like variety, so I'm yoinking this one to use in the future. Also, you may disagree, but I really do like the concept they've got going on for these guys and their Undead Zen. I'd just strip the part where they attack people or mutilate corpses and bury them unceremoniously, and they're good to go.
I am so tired of evil fey. So tired.Grimstalker
Oh hey, another Fey! Yay! The grimstalker (known by others of its kind as the banaan) is specifically a CR 5 Fey that resemble claw-bearing elves made out of wood. They are feared and revered as expert assassins, their claws leaking with poison and their control of plants allowing them to control things such as scythe or hangman trees to do their bidding. They aren't particularly fond of people entering their woods, either, so pretty much the only individuals that aren't attacked by grimstalkers are evil Druids.
Those mad doctors will never, ever learn.
I find the mental image incredibly hilarious and will most definitely use it in the future. I do wonder if I can actually play it for drama rather than easy comedy...Hoar Spirit
The undead apparition of one who died from extreme cold. It does pretty much what you'd expect. It is worthy of note, however, that there appears to be a bit of a Take That in the imagery: namely, the illustrated hoar spirit is that of an elven warrior wearing the stereotypical "chainmail bikini".
I don't know how receptive you are to constructive criticism, but if you would care for a suggestion, a potential reason you aren't getting much responses is because your wit has been in decline lately. I mean, sure, there might be a percentage of people who read this to know what the book is about, but I assure you that a great deal of readers (like me) come here for the witty MSTing of the book's contents, which you're rather good at. Feel free to vent your frustrations on the book in the wittiest way you can. That will help you regain your readership.