The Beast Fears Fire - Goopy Ideal Solids

Goopy Ideal Solids [Disaster 2]
Impulse - To Entrap, Deny Passage

There are some people who believe that the Underworld is has something beyond it; another world, possibly the Other, maybe something entirely else. Every once in a great while, someone gets a weird notion to try and navigate through the Underworld and see if there is another side. These end in failure at the absolute best, which owes itself partially to the fact that the less accessible areas of the underworld are filthy with invisible custodians that sweep up everything they can find. Filthy with those things and nothing else; the domain of the Goopy Ideal Solids (GIS) is one of bare rooms and empty caves, and a striking deviation from the Underworld's usual creepy opulence.

Most of the time, this is going to be your only warning that the GISs are about. These creatures are completely invisible, they make no sound and smell like nothing. People who have survived contact with them report that the things are solid and have a soft, rubbery texture, at least before the neurotoxin they secrete numbs the victim. When revealed (shadow witchcraft does this reasonably well), they appear in the shape of one of the five ideal solids - tetrahedron, cube, octohedron, icosohedron and dodecahedron.

Harm 2/Numbed, Suffocating. GISs deliver a powerful paralytic that absorbs through skin, fur, hair, cloth, whatever; which causes instant local and fast-acting total paralysis of all voluntary muscle groups. The GIS will move to envelop anyone it touches, like you do. Given that the only air inside a GIS is that which you take with you, extended stays are probably not recommended.

The Shape of Things to Come
When you find yourself in a place patrolled by Goopy Ideal Solids, Face Disaster.
On a Hit, nothing to see here, move along :D
On a Hard Hit, you get a chance to see what path the GIS(s) is (are) taking and either completely avoid them or find the place where they stash all the stuff they pick up.
On a Miss, you wander into one. Take Harm as stated, sucker.

I walk along darkened corridors
Given long enough, GISs can digest everything, but they do tend to leave some things behind, always in the same place. In the Underworld, there's always a nook or cranny or alcove in which to stash things. If a group of GISs patrol an area, they tend to all use the same dumping ground. You can find a lot of cool stuff there, but the dangers in looking should be apparent.

Every once in a while, GISs do make it into more populous and accessible parts of the Underworld, and from there, out into the world. Sunlight seems to degrade the creatures pretty quickly, so a successful individual or colony will sometimes stake out an abandoned building and get to work cleaning.

One last odd thing about GISs - they are occasionally unable to interact with certain people for reasons not fully explained. Not a lot of serious scholarship has gone into this, but there is a hypothesis that certain shapes of GISs cannot touch or be touched by certain people based, somehow, on their ability to anticipate and react to danger. Tetrahedrons seem unable to capture the hopeless, cubes the average, octohedrons the savvy; icosohedrons and dodecahedrons seem unable to get the higher levels of ability, but the simpler solids also seem less likely to net these people for reasons you can anticipate.