Mallethric

Mallethrics are thought to be the product of corrosion and magic breeding together in foundries and battlefields where enchanted arms were left to rot. Folk tales claim a forgotten guild alchemist once tried to 'grow' a preservative for weapons and instead produced a hunger: a small, hungry organism that feeds not on flesh but on enchantment-carried metal. Over generations these organisms enlarged and adapted; the ones that survived became the Mallethric. Mallethrics dwell where metal and magic meet in abundance: ruined armories, derelict forges, ship graveyards, and the slag-heaps outside old mage-fortresses. They travel in small family clusters, following the sound and taste of a ringing blade. The Gearwrights' Guild of Greth Hollow keeps meticulous, terrified records of encounters, and Master Tilvor Hents of the Sunderdeep Foundry wrote the first field notes warning that a Mallethric can strip a weapon of its magical properties for days — and that some particularly old specimens can permanently cleave enchantments if given time. Adventurers who lose a treasured sword to a Mallethric rarely recover it in the same form.

Imagine a creature roughly the size of a hunting dog to a small pony: an elongated, segmented body 6–8 feet long with thirteen overlapping plates of corroded iron that shimmer with bluish verdigris. Each segment bears a pair of jointed, crab-like legs tipped in pincer-like claws that scrape and rasp; the forebody terminates in a triangular maw lined with grinding plates and whisker-like tactile antennae that drip a fine, rust-colored powder. Veins of darker, almost black iron run like scars across its plates. Interspersed amid its armor are tuberous sacs that glow faintly when it has recently consumed enchanted metal. Its movement is low and deliberate; when threatened it will curl, presenting a ring of rust-teeth and a cloud of metallic dust. Scale reference: a crouching human reaches about to the middle of its flank; a standard doorway is barely taller than its raised head.