Hidden below @GrusksGuildAndForge lies a network of damp basalt tunnels known as the Underforge Caverns. These natural vents breathe sea air through cracks in the coastal bedrock, feeding the forges above and giving the caves their steady pulse of wind and heat.
@LysandraKettlemire and @MarnieCopperpot maintain strict access control — what began as a vent shaft became a thriving alchemical ecosystem of glowing moss, venomous flora, and fluttering insect life. Fire is banned here: one spark can turn the whole cavern into a furnace.
Set behind the main forge, this thick, rune-sealed hatch marks the descent. Beside it hangs a reel of glow-silk rope and a crate of Glow Torches (20 ft dim light radius, made from Ambercap resin and glow silk).
A wooden placard reads, in Grusk’s handwriting:
“Use glow torches. No full plate. No fire.”
A narrow, sloped passage carved by hammer and steam. The air is cool and metallic; moisture drips from the ceiling. After about 150 yards, faint bioluminescent patches appear on the walls — signs that the living ecosystem begins.
Encounters:
1–2 Wanderer’s Mold hazards (CR ½).
Stray Marrow Moths and Glow Beetles (harmless but startling).
Resources:
Ambercap clusters growing near vent mouths.
Residual Moon Honey pooled in cracks.
A broad chamber where @LysandraKettlemire cultivates manageable flora. Moon Vines twine around basalt columns; Larva Silk cocoons glimmer overhead. Copperpot and her apprentices harvest reagents here under supervision.
Collectibles (Levels 1–3):
Silk Larva cocoons → Glowcloth fibers.
Marrow Moth dust → Sleep powder.
Moon Vine sap → Flashpowder base.
Ambercap resin → Light lenses.
Encounters:
Lunamoth Swarm (CR 2).
Wandering Kobold scavengers from old tunnels (CR 1 each).
A long fissure where the sea air howls upward like a pipe organ. The floor narrows to slick stone ledges; strange dark spores hang thick.
Explorers must crawl or climb, avoiding pools of Wanderer’s Mold and patches of Venom Fungus (minor poison effect).
Hazard: 50 % chance of explosive spore ignition if flame used.
Reward: Rich deposits of crystallized toxin useful to alchemists.
The lowest hollow, lit only by the faint shimmer of toxic pollen. In the center grows the Venompetal Bloom (CR 5) — a massive carnivorous plant rooted in venom-soaked earth. Its blossoms pulse with inner light, exhaling clouds of paralytic dust that cling to armor and skin alike.
Abilities:
Paralytic Cloud (15 ft radius).
Whip Vine (10 ft reach).
Toxic Burst on death, releasing poison gas.
Harvests:
Paralytic Pollen → Darts, traps, sleep agents.
Petal Toxin → Multi-effect poison base.
Stem Resin → Corrosive solvent for chitin or scale.
Guild Policy:
Lysandra forbids uprooting or burning it. Harvest only with sealed jars; notify her before any fight.
Every few minutes, the wind reverses direction as the tide shifts, carrying the faint scent of salt and metal. The walls glow softly with Moon Vine veins; droplets patter like a heartbeat. Farther in, a low hum fills the ears — the combined rhythm of venting air and living roots.
At the deepest point, when the forge above cools for the night, the cavern breathes out one long sigh — a whisper that miners once mistook for words.