I vaguely recall there being a mannequin hallucination in some mod. PK’s, I think.
Anyway. Make it an actual monster. Hidden in some cellar, dungeon, etc, a random amount, maybe 1-15?
They can only grapple, and move slightly faster than your standard zombino. Basically, they swarm you, and hold you down.
Now, after that, they could do one of a few things, some likely easier to implement than others.
1.) They just keep holding you down, and do generally unnerving things. Whisper, groan, whimper, hug you, slap you, shake your head, etc. Basically just smash your morale to bits. They just do this for a full day, like weirdos. Maybe have one of them whisper how much longer until it’s been 24 hours, so players don’t throw their hands up, and think they fell into some inescapable trap.
2.) Once grappled, they start slowly killing you by punching or strangling or some other spookier method.
3.) Keeping you held down, they start screeching, attracting any other nasties.
4.) Each does a certain amount of damage, “draining” you, be it through blood-sucking or mind rape or something. Once they’ve had their fill of blood/brainwaves, they disappear/turn back into normal mannequins, or something like that. Basically, become a non-threat.
5.) Steal your stuff and run away, like a zombie technician. But with running away.
6.) Tear a limb off, and leave. OR, tear EVERY limb off, essentially fucking you over harder than the Black Knight.
7.) Status effects ahoy, they magically(?) assault you into blindness, deafness, some other thing, and release you. Lasts for a day or less?
8.) Now this one is weird, and might be hard to code. Once grappled, a different mannequin appears, jabs you with a needle/does a magic incantation/something like that, and then YOU become a mannequin! Be it just a “Special Game Over”, or you become a weird type of mutant (which is a whole different talk, implementing a new mutation “path”).
These, especially variant one, are inspired from the mannequin-monster-things in Silent Hill: Shattered Memories. Y’know, the ones that just jump onto you, and generally act like creeps.
Maybe the ones from the movie too.
But the movie sucks.
UPDATE on my older post about the gut parasites. Mouth-Wrenchers? Throat-Tunnelers? Not sure what to call them. But, there could be another enemy type added, a ‘Parasite Carrier’. As you can probably guess, it’s an NPC or animal or something that is playing host to the foul critter. They attempt to restrain you, be it by grappling or paralyzation (perhaps the parasite can emerge from their mouth to bite/string you, like the plagas in Resident Evil 4?), and puke a larva into your throat, spreading the infestation. After you’re infested, they won’t kill you, unless you take them down to low health. Trying to initiate combat with one while you’re a host will likely get you some sort of message about your gut-buddy not liking that, and warns you. If you go ahead and do it, maybe it thrashes around to give you pain, or something.
As a side note, the parasite will be amping the ‘Parasite Carrier’ up in combat as well, as it would do with you. So just boosted stats.