The derodroni (/ˈdɛrədroʊni/) is a narrow-jawed, sharp-toothed stranger with attenuated, sprawling features. Pale in coloration, its stripes present with mottled edges, its eye markings red-rimmed and inflamed in the immediate area. Although slick to the touch, the derodroni's cold, clammy skin does not attract dirt, and leaves behind no fluid or residue upon any object it touches. Its dull pink flesh is stringy and slimy, and the derodroni's body cavity is small and vestigial, possessing a small set of varied grey organs, any parallel to known structures indeterminable.
In 17.7% of individuals, this muscle tissue contains numerous small slivers of metal; muscle tends to congeal slightly around these shards as the derodroni ages. Although sharp, these shards are weak enough to be bent with little difficulty1, and are pewter-like in color, texture, and luster.
The derodroni's flesh retains a temperature roughly 10-12°F cooler than the surrounding area, and does not heat up significantly when exposed to (things that glow red with heat). Its regenerative ability is minimal, taking up to several years to heal from even an inch-deep cut, with scarring always pinching outward from the wounds.
The derodroni's voice (zylv nit some- thn- zylv.4) is high in pitch, droning, and creaking; (what it calls) a voice is something fed through cheapest filter, with abrupt tonal shifts, undertones of record scratches. These words are too distorted for linguistic structures to be determined (e.zv) aside from the occasional sibilant.
The derodroni appears two to three miles underground, where it generates in natural hollows between large rock layers. It starts off as a limbless, worm-like form which squirms2 upon its sides, growing to full size in a rapid and sudden lurch [44.] after several weeks in this neotenic form. Despite its relatively large size when fully grown, the derodroni [44. shoved through; zon] does not appear within spaces which would allow it room to move3, but instead appears only within tight gaps and crevices4.
Although the derodroni appears by itself 99.989% of the time, "groups" of individuals do occasionally form in proximity to one another, with certain cities displaying a greater tendency for groups of derodroni.
The derodroni's avaricious and hostile demeanor remains curtailed by its entombment. Its constricted territory gives it just enough room to slip a finger between itself and the wall, but not nearly enough space to change its position beyond an occasional shift of its arms, a reshuffling of its legs, or a sliding of its tail or head.
The derodroni elicits severe and specific pain to sensitives in the city beneath which it dwells, causing the sensation of a knife embedded in the head, chest, throat, or below the belly button5, albeit with no actual physical injury. This sensation occurs abruptly and ends just as suddenly, affecting individuals for no less than 34 seconds, but no longer than seven minutes, with most incidences tending towards shorter durations.
The criteria by which individuals are affected appears random; in some cities, all sensitives may be struck with almost daily occurrences of this sensation, whereas in other cities, only one sensitive6 may be affected for the entirety of the derodroni's life.
Otherwise, as it is found only many miles beneath the ground, there are no known interactions between sensitives and derodroni.
The derodroni dies slowly, unable to either prevent or expedite its demise. As it ages, the derodroni's hissing and squirming eventually giving way to shuddering whimpers and a decrease in physical activity. When this stranger dies, its skin shrivels and entangles itself over a soft, dark corpse which becomes unidentifiable as it decays, with only those individuals containing metals leaving behind any monument7.