The Basalt Whisperer

retro illustration, male deep gnome beastmaster mutated into a cavern horror, crouched on slick basalt summoning phosphorescent cave centipedes, vast subterranean hall with Romanesque arches carved into mica-studded schist and a rusted dwarven bridge, bioluminescent fungi and dripping calcite, rim-lit by ghostly turquoise lichen and a lone red lantern, ominous and pulpy adventure tone, muted jewel tones with sickly greens and ember reds, inked linework with halftone shading on aged pulp paper fidelity