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Hollowshade Grotto

The damp earth swallows the light and whispers of ancient hunger.

15 roomscavemedium

A network of natural limestone caverns partially expanded by a forgotten subterranean sect. Slime-coated walls and the constant rhythm of dripping water create a claustrophobic and treacherous environment.

The air is heavy with the scent of damp earth and rot. Dim bioluminescent fungi provide a sickly green glow, while the constant 'plink-plonk' of water echoes through the narrow tunnels.

☠ Threat

The Silk-Weaver, an oversized arachnid mutated by the lingering magic of the Deep Heart, now rules the lower depths. It has turned the cult's former sanctum into a larder, filling the passages with sticky, vibration-sensitive webs.

History

Originally a bear's den, these caves were claimed decades ago by the Order of the Deep Heart, a cult seeking a mythical gemstone. They carved shrines and prisons into the rock before a localized earthquake sealed them inside, leaving only madness and dust.

Encounter Table

CR
1CR
Cave Fisherx1

A multi-legged insectoid that pulls prey up with sticky filaments.

1/8CR
Feral Cultistx1d4

Crazed survivors who have forgotten how to speak and hunt like animals.

1/4CR
Giant Centipedex1d3

Disturbed by the party, they scuttle out from cracks.

Rumours & Whispers

1

A glowing violet heart is hidden at the deepest point of the caves.

2

The spiders in the cave have grown to the size of wolves.

3

A former cultist still lives in the tunnels, babbling about the end of the world.

4

A lost merchant stash is hidden behind a door with a broken sign.

Quest Hooks

1
The Missing ReliquaryRetrieval

Quest giver: Father Hallow

A local temple wants the Silver Offering Bowl recovered for a purification rite.

100 gp and two potions of healing.

2
Clear the PathExtermination

Quest giver: Garnet Stonefoot

Miners want to expand into the caves but are terrified of the spiders.

Mining shares worth 200 gp over time.

Corridor Notes

Near Room 3 and Room 11

Patches of slippery, translucent slime that force an Acrobatics check.

Corridor between Room 4 and Room 7

Small, carved niches containing burned-out tallow candles.

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