Entries Tagged as 'Monsters'

Monster: Mimetic Ooze

A monster for D20 Modern games.

Take human nerve cells and thread them through a newly developed form of plastic muscle fiber that becomes flexible when electrified. Cap the fibers with microscopic sensors that let the nerve cells interface with the human nervous system. Float the mesh in a bio-active gel that can adjust its density until those nerve cells grow together into something that approximates a brain. In an ideal world, you end up with an intelligent substance that can change shape on command.

This is not an ideal world.

Mimetic ooze, in its natural form, looks like an extremely tangled net of fine silver wires caught in a lumpy mass of silvery jelly. The ooze can change its shape at will in response to the commands of humans in its vicinity, but it has a problematic interpretation of the word “command.” It responds primarily to subconscious desires, impulses and fears, responding to strong emotion in a manner more empathetic than telepathic. If the ooze connects to a person, it does its best to obey the target’s unconscious desires and commands. Since most people are a contradictory jumble of impulses, this can have disastrous results.

Are you lonely? A mimetic ooze might take the form of your ideal mate — or kill anyone who approaches you to make sure you stay lonely. Hear a noise in the attic and wonder if it’s a monster? An ooze could become the physical manifestation of what you fear most.

The rogue biotech corporation that created the ooze was unable to profit from its work because of severe and unexpected staff cutbacks. Several oozes responded to the paranoid fantasies of one employee, locked all exits to the building and systematically killed all of his coworkers. That worker remains in the building in an abandoned office park, completely alone, as the oozes roam free in the form of the people they killed.

The ooze connects to people using exceedingly fine, sticky filaments of neural matter, like spider webs that extend from the creature and cluster on the skin of targets. An ooze so engaged is surrounded by a constantly changing set of connections as filaments extend and break. The filaments are almost invisible (Spot check at DC 30 to notice one), but they glow brightly when exposed to ultraviolet light. They also are as weak as gossamer unless strengthened by the ooze, which can toughen it by one hit point per round to a maximum of 30 hp.

Mimetic ooze has an inbuilt sense of self-preservation and will fight to defend itself by slamming pseudopods of gel into assailants. Otherwise, it attacks when connected to someone who feels threatened, suicidal, shameful or fearful.

Like all oozes, mimetic ooze is immune to mind control, poison, sleep, paralysis, stunning, gaze attacks, visual effects and other attack forms that rely on sight such as illusions. Oozes also are not subject to critical hits, flanking or the effects of massive damage.

Medium Ooze
Hit Dice: 3d10+10 (31 hp)
Massive Damage: -
Initiative: +1 (Dex)

Speed: 30 ft.
Defense: 13 (+1 Dex, +2 Natural), touch 11, flat-footed 12
Base Attack Bonus/Grapple: +1*/+2
Attack: Slam +2 melee (1d6+1)
Full Attack: Slamm +2 melee (1d6+1)
Space/Reach: 5 ft. x 5 ft. / 5 ft.
Special Qualities: Telepathy, Change Shape, Copy Abilities, Fire/Cold/Electrical/Acid Resistance 30
Weaknesses: Vulnerability: Sonics (30)
Saves: Fort +2, Ref +2, Will +2
Abilities: Str 13, Dex 13, Con 13, Int 10, Wis 13, Cha 13
Skills: None*
Feats: None*

Special Qualities

Telepathy (Ex): The ooze’s telepathy is actually nerve signals transmitted along its neural fibers. It can receive commands from all humans touched by these filaments and even send messages back, though they are usually simple and incomprehensible. The ooze can extend filaments to everyone within 30 feet, but it can choose to exclude some people. The filaments grow at a rate of 10 feet per round. The filaments only can interface with bare skin but can thread through most clothing. Wearing a biohazard suit or similar complete covering prevents its telepathic intrusion.

Change Shape (Ex): The ooze can assume almost any form. Its mass stays constant, but it can adjust its volume and density proportionately. It has a maximum Strength of 30.

Copy Abilities (Ex): While connected via a neural filament to a player character, the ooze can use that character’s Intelligence, Base Attack Bonus, feats and skills.

OGL Horror

Special rules for OGL Horror.


Investigate (DC 10): Looks like chemical burns on the carpet — not especially serious ones. At a guess, there was a really bad stain and someone went overboard with the cleanser.

Investigate (DC 20): There are fragments of some sort of plastic lodged in the wounds. The killer was wearing some sort of latex gloves.

Investigate (DC 35): There is some sort of strange artificial spider web on the victim’s neck and hands.


Gather Information (DC 15): Neighbors say that the victim was being stalked by someone. Certainly, there have been quite a few strangers in the area recently.

Research (DC 30): A local research corporation was rumored to be on the verge of a breakthrough, but has since clammed up and denied all the rumors. Their stock price has collapsed.

Knowledge (physical sciences) (DC 30): The spiderweb found could be shattered by high-frequency sound waves.


Madness 12 when the nature of the ooze is revealed. Different forms may cause different types of Horror.

Game Ideas

The horror of the mimetic ooze is not the monster, but its ability to turn the thoughts and desires of targeted characters to horrific form. One good best time to use this monster is after a climatic world-saving adventure, when they’ve confronted and overcome a truly fearsome horror. How has that changed them? Throw them up against a mimetic ooze and find out.


This weblog entry is Open Game Content licensed under the Open Game License with the following Section 15.

15. Copyright Notice

Open Game License v. 1.0a Copyright 2000 Wizards of the Coast, Inc.

Modern System Reference Document Copyright 2002 Wizards of the Coast, Inc.; Authors Bill Slavicsek, Jeff Grubb, Rich Redman, Charles Ryna, based on material by Jonathan Tweet, Monte Cook, Skip Williams, Richard Baker, Peter Adkison, Bruce R. Cordell, John Tynes, Andy Collins, and JD Wiker.

OGL Horror Copyright 2003 Mongoose Publishing Limited.

D20Modern.Com Copyright 2009 World Readable.