Enemy Concepts

Enemies/ Monsters

 * Giant Bear
 * Witherchild
 * Modrons

The Impaled - Ancient warriors that are petrified and appear as statues in their death throes, always with a blade impaling them, the blade clearly not being pertified but appears as a tempting magic item. If the blades are ever removed, the statues animates and the blade is bound to the unpetrified warrior as as Eldritch Knight Blade until slain.

Reaching Tree Fiend - A tree with a visibly twisted trunk and twisted branches, swaying even without wind. If attacked, it unwinds its branches revealing them to be magnitudes longer than they first appeared, usually reaching much further than the attacker can run in time to escape. Buries its victims under its roots.

Cultists -
 * Stupor-driven cultists that carry goblets of foul ichor or acid, they seem to never run out of this liquid even as they fling them on the party.
 * Cultists that chant and kneel in prayer, shaking. If not killed quickly, morphs into horrible monsters.

Hyrdabomination - grotesque patchwork monster that looks stitched together, each part having a life of its own, and needs to be separated from the body before it is completely defeated.

Moon Rats- Rats that gain intelligence closer to the full moon, and get larger and enact intelligent plans to take over towns and villages one by one.

Revenant Spirit - a spirit that can only possess willing humanoids, who find hosts in the desperate in exchange for promises of eternal life, but in reality the spirits take over the bodies and use them to finish tasks left undone in the spirits life, often dangerous and lethal tasks.

Interrred - A hulking humanoid behemoth made of stained and sticky rags that smell horrible, when damaged/killed it falls apart revealing a dozen rotting bodies twisted together into a roughly humanoid shape.

Slag elementals - Large humanoid-shaped machines that emerge from lava and from superhot fires, their frame and form melting from the heat, making them into blob-shaped automatons.

Zombie Golem - Golems left forgotten in bodies of water for hundreds of years, that have rusted and fallen into disrepair. Theis arms or legs may no longer work and they crawl out of water towards foes, their faces and mechanical parts disfigured and falling apart.

Necromorph- a zombie monsters with no head, but has a cavity where the head should be. Will attempt to grapple a PC and put their head in that cavity, taking over their mind completely and leaving the rest o ftheir captive's body limp against the zombie's back.

Flesh treant - A towering treant that was grown in vile places that spawned flesh and bone instead of plant and wood.

Vengeful visage - Ghosts that take an incorporeal form and rise up from underneath discarded shields and weapons, and wield them.

Doomsayer - a crazed madman that quietly mumbles to himself, but when he spots a foe, begins to loudly scream accusations and foretell of horrible events that will happen to the target, his words cause hallucinations of black tentacles grasping at his target and does psychic damage.

The Sisters - Coffins with the bones of the deceased built right into the coffin itself, along with a weapon, a jawbone from an unknown animal, a vial of black liquid and a bundle of dried herbs in a vial. These coffins contain the spirits of powerful sages from ages past. They can be communed with to learn their secrets (including spells) or if threatened, they will attack with psycic energies and trap their enemies in a mind-prison where they must face their fears.

Concepts
Scavengers that use bodies/other lures while hanging from the ceiling to attract prey.

Plant monsters that when killed, rapidly age and decay.

Monsters that when defeated go 'poof' and drop some coins or a potion.

Small glowing monsters that explode, possibly thrown by other larger monsters.

Monsters bursting forth from a corpse.

Strong monster (yeti, gorilla, etc) that slams the ground and creates difficult terrain and throws enemies into the air when standing in its area of attack.

Monster with an aura that breaks down metal slowly over time, can pulse and destroy armor in a radius, as well as attack at range.

Creature in cold climes that solidifies to ice when slain and then shatters.

Creatures that burrow and attack with their spines from underground.

Orphaned familiars corrupted or vile, discarded by evil wizards.

Floating crystals surrounded by magical energy, consumes life force for fuel. Is made up a valuable magical reagents.

A tumor-like mass that is covered and carries by animated writhing vines.

petrified trees that attempt to eat and cover themselves in flesh to hide their desiccation.

A shadowy figure made from spun thread or spiderweb, controlled by a spider or puppetmaster.

Enemies that when defeated leave behind a rune or skull that in 1d4 minutes will resurrect.

A creature exposed to massive amount of venom from an insect or other creature, turning it into a simple-minded protector and host to new venomous creatures.