Heyo, I'm DMing and need help

Poltergeist was such a good film

Yes

A centipede lizard monster that collects human remains and can coil into itself to disguise as piles of bones. Coloration varies depending on environment and it's usually found in harsh areas where corpses would normally be found, like atop steep cliffs, extremely cold or hot areas where people would submit to the temperatures easily, bogs and swamps, etc.
Essentially a type of mimic I came up with ages ago.
I don't know where your setting specifically is or where it would take the players, but demons that disguise themselves as murals and glide along the walls would also be interesting.
A blurry humanoid that's constantly twitching about with elongated arms and hands?
A humanoid creature that roots itself as a tree and from a distance, looks like a dead tree, but is actually an enlarged arm and hand stretched out to resemble branches. Perfectly still until something gets close in which case it tries to slam its arm down upon it before flailing around and derooting itself in the process, screaming in agony.
Both of its arms are connected, basically grafted together, but one gets absorbed into the other while the other grows to resemble the tree branches.
If you want something for water, there could be a beast that digs into the ground with only it's back showing, which has a pond or pool on it, depending on the environment. The body of water could be clear and serene, but smell awful and slightly rise and fall to resemble breathing, to give the party warning.

I like mimic type enemies if it wasn't obvious.

ok this monster concept came to me in a dream so it might be a stupid

>it first infects a human host somehow, the true form of the creature has never been seen
>said human quickly changes form, turning into a fleshy blob of organs and bones that oozes blood and pus
>this blob moves around by inching across the floor and envelops anyone else it finds to add them to its mass
>despite being a incoherent mess of gore, the blob still retains any memories and personalities of the people it absorbs, and is capable of impersonating them perfectly using their voices
>for example, the creature might scream for help from behind a door using a trusted NPC's voice
>due to this, the demon prefers to stay in the dark or tight areas so it can attract or trick people into getting close to it for it to absorb (it is often too slow to absorb people in open areas)
>if attacked, the creature will scream in the human voices of the people it has absorbed, and said people can be heard pleading for freedom or merely death
>it's unclear if the people assimilated are even conscious or alive, or if this behavior is yet another trick by the demon to confuse or demoralize its prey
>the creature is also very resilient to harm due to possessing no weak spots, and anyone who tries to kill it might become absorbed if they aren't careful

pic related is what it looked like to me in the dream, only bigger. i think the dream was pretty "the thing" inspired anyway, i recall the creature taking human form at some point and changing back but i don't know if that's worth incorporating since it's a lot harder to explain

OP here, I very much like these ideas

Sounds like Dragon Age.

Someone at my table told me that.
I honestly don't know anything about dragon age aside from the fact that there is a body surfing witch and a bisexual elf assassin manwhore that tumblr loves

Maybe it can control its form with concentration. To better escape or lure in prey. Like taking a humanoid form to cast a silhouette to back up its voice impersonations. Or maybe break off tiny bits of itself to impersonate things like rats or birds ,that hide in shadows to mask their true form to spy and scout. Id imagine in this "observation mode" it would hide somewhere safe needing all its concentration.This would allow it to use more advanced strategy's every once in awhile. Keeping the adventurers on their toes.

Faces done too well, or done poorly are always fun as a send up to the uncanny valley, that feeling sits perfectly well between the real and the imagined, so having a demon that exists as a super-sized reflection of either an npc or a player character might be effective, especially if you have someone who can draw that character's face in that way.

pic related, fuan no tane is a good source for that sense of unease that we get with faces that look wrong.

Demons come from a surreal dream dimension which is also where magic comes from and mages are distrusted because demons can come through them if they lose control, or something like that.

Anyway, for demons that represent the people that dream of them, you should get symbolic, like dreams. Primal fears are always good, but what about warped or suppressed desires that a person is ashamed of, and he has dreams about them? What about relationship issues, like co-dependency? Obviously these shouldn't be literal, but the former could be a hideous, twisted sex demon that hates itself and tries to force its twisted desires on people and kidnaps them in the hopes that it can "make them understand" and accept it, and the latter could be a horrid fusion of two people who twist and pull at each other and mutilate each other but can't separate. Some shit like that.

This is literally how the monsters from Silent Hill were made, both during development and in-game.

Neat. I know literally nothing about Silent Hill, except now how their demons are made.

>Darkbeast Paarl's non-amerimutt ancestor

Some beasties from my dreams:

>Squirrel-sized black widow spiders
>A classic witch that could swallow me whole, like a snake
>A shadow of a person that induced a lot of screaming for some reason
>Me, with my teeth locking and snapping out of my head
>Raptors from Jurassic Park
>Tentacle Sharks. Sharks with tentacles instead of fins

Yeah these don't sound all that scary when described.

this. you can have players walk through areas that shift from dreamworld to nightmare.

>Books that make no sense when you read them
>Pens that work normally when you write with them, but the writing is gibberish when you try to read it again
>Dogs with limbs that bend the wrong way and float a few inches above the ground
>A man that is always there watching you when you turn around or go somewhere else
>Food that eats you from the inside out if put to your lips
>Succubi that eat by forcibly pulling their victims into their vaginas, breaking every bone along the way
>Idealized but imperfect copies of people you know, such as your family. They believe they are real, but will slowly and painfully degrade after creation, losing their memories and physical abilities. They will be aware they are dying and won't understand why unless you tell them. It doesn't make them love you any less.

Go look up Dreamblade's creatures. It was an old WotC minis game, kind of like a grid-based mtg where all the creatures were pulled out of dreams.They should be good inspiration.

i think i have some

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>Clowns.
vampire ducks.
>The groke.
>Gremlins with whips.
>Giant red head floating through the air, trying to ram its way through windows.
>a hairy reptilian humanoid displaying signs of downs syndrome sneaking into your house to look at you while you sleep

These are all nightmares I've had.

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Claymore has some good, kooky monster designs.

Very anime though.

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The two 'arms' sprouting from her shoulders each end in a giant head instead of a hand, which she swings like flails.

El americano...

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>And there in the distance I saw it
>and infinite roiling chaos
>trying to find the end of it only drew you in deeper
>until half the team had been sunken into its depths

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I think this thing making horse neighs and whinnys while crawling around like a spider would be pretty fucking creepy