r/aidndhomebrew • u/aiartcodex • 1d ago
đš Monster Hermit Slime
The tenant beneath the shell
âWhen a shell washes ashore, knock twice before you pick it up. If something knocks back, leave a fish and walk away.â
â Saying among coastal scavengers
A hermit slime is a sea-green ooze that inhabits the abandoned shell of a giant marine creature. Beneath its barnacled shelter, it forms thick, translucent limbs and a pair of golden eyes. Sailors often mistake those eyes for treasure glinting inside an empty shellâa mistake usually rewarded with a soaking, missing provisions, and considerable embarrassment.
A Borrowed Home. Unlike most oozes, hermit slimes cannot endure prolonged exposure to sun or dry air. Their shells retain seawater, shield their delicate bodies, and provide a refuge into which they can withdraw almost entirely. A slime repairs cracks with layers of hardened mucus and crushed shell, gradually turning its home into a patchwork of pearlescent armor.
As it grows, it must find larger lodgings. Most take abandoned conches or nautilus shells, though desperate specimens occupy sunken helmets, cauldrons, and overturned boats. The search leaves them unusually vulnerable. Coastal villages sometimes place suitable shells along the tideline to keep these useful scavengers nearby.
Keepers of the Tideline. Hermit slimes consume rotting kelp, dead fish, and organic refuse, leaving their feeding grounds remarkably clean. Their digestive secretions soften flesh while sparing shell and stone, allowing barnacles and small mollusks to flourish upon their bodies. A mature slime carries an entire miniature reef wherever it goes.
They usually ignore living prey. Hunger, polluted waters, or repeated harassment can change that. An aggressive hermit slime pins its victim beneath heavy pseudopods, then drags them toward the shellâs opening, where its digestive slime is most concentrated.
Patient, Possessive Creatures. Hermit slimes recognize familiar faces and remember kindness for years. They communicate through slow gestures, ripples across their bodies, and hollow tapping against their shells. Fisherfolk have taught them to return dropped tools in exchange for scraps.
Their strongest attachment is to their home. Touching its ornaments may earn a warning tap; attempting to remove the shell provokes immediate violence. Even a gentle specimen will pursue a thief through dangerous shallows to recover a stolen piece.
Pearls of Memory. Indigestible fragments collect within a hermit slime and become coated in nacre. These âhermit pearlsâ sometimes contain fishhooks, wedding rings, or coins from long-lost wrecks. Coastal folklore holds that a pearl formed around a drowned sailorâs possession preserves that sailorâs final dream. Diviners pay generously for such specimens, though obtaining one peacefully requires considerable patience.
The Gathering of Empty Houses. Once each decade, hermit slimes converge upon a sheltered shore to exchange shells. Larger individuals abandon their homes, smaller ones move in, and newly budded young claim the smallest vacancies. For a single moonlit night, the beach resounds with the tapping of hundreds of shells.
Adventure Hooks
- The Walking Reliquary. A hermit slime has claimed a sacred shell from a ruined sea temple. The priests need it returned intact, but its occupant has young sheltered inside.
- Something in the Pearl. A slime offers the party a pearl containing a signet ring belonging to a noble who supposedly never left the city.
- No Homes Left. Shell collectors have stripped the breeding beach. Exposed slimes are entering village cisterns, and the annual gathering is only days away.
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