Železňák

Rarity: Uncommon. The Železňák (Kettlebellus domesticus) is a sedentary ferrovorous cryptid endemic to the apartment blocks of Central European housing estates, particularly the panelák neighborhoods of Moravia. Standing approximately 25 cm tall and weighing between 8-16 kg, this creature has evolved to perfectly mimic common household fitness equipment — specifically cast iron kettlebells. Its exoskeleton is composed of a biogenic iron-carbon composite secreted by specialized dermal glands, giving it the exact appearance and texture of powder-coated cast iron. The distinctive "handle" is actually a muscular arch used for thermoregulation, dissipating excess metabolic heat generated by its extraordinarily dense body. Two small, obsidian-black eyes are concealed within the surface texture of its spherical body, visible only when the creature blinks — roughly once every forty minutes. The Železňák feeds on iron trace deposits in wooden flooring, slowly absorbing ferrous minerals through its flat underside via osmotic microfilaments, which explains the subtle discoloration often seen on parquet floors beneath long-stationary kettlebells. It is completely immobile when observed, entering a cataleptic state indistinguishable from an inanimate object. Movement occurs exclusively during deep night (2:00-4:00 AM), when it slides across floors at roughly 3 cm per minute, leaving faint scratches that residents typically attribute to furniture settling. Reproduction is poorly understood, but specimens appear to bud — a small 2 kg "kettlebell" gradually forming beside the parent over several months. Residents rarely notice, assuming someone in the household purchased a new weight. Its primary weakness is rust; prolonged humidity above 70% can compromise its exoskeletal integrity, which is why specimens are never found in bathrooms. The species exhibits a curious symbiotic relationship with human exercise habits — the more frequently it is lifted and swung, the more kinetic energy it absorbs through piezoelectric crystals embedded in its shell, accelerating its growth. Scientists theorize this explains why kettlebells always seem heavier than their labeled weight after a few sets. The specimen documented here was found motionless against a baseboard in a Brno-Nový Lískovec apartment, having apparently migrated from its original position near a workout mat sometime during the previous week.