The Iron Boat

Clement pushed back the rotting canvas flap that sealed the mouth of the sunken grotto. The stench hit them immediately: wet soil, cave mould, and the sharp, alkaline sting of ozone. Ahead, torches wedged into the limestone illuminated half a dozen masked cultists gathered in a loose circle around the mayor. At the centre of the cavern, a recessed basin of black glass shone with a dull, interior violet sheen, washing across the dead miner on the floor and the blood pooled around his ribs.

Before the chant could rise again, Clement whispered a working of minor phantasm, weaving the visual likeness of the town watch across their cloaks and hauberks. Dressed in the illusion of Grave Hollow guardsmen, the four of them moved past the threshold in step, keeping their chins lowered. They took five strides across the wet gravel before the mayor turned, wiping his reddened hands on an apron of sailcloth. His eyes narrowed, catching the shimmer where the glamour hitched against the edge of Halward's broad shoulders.

"Intruders!" the mayor shouted, backing toward the rear archway. "Cut them down!"

The cultists drew short billhooks and rusted picks from under their robes, but Halward moved first. Without his mace, the fighter drove himself straight into the centre of the room, slamming both iron-plated gauntlets into the dry-laid masonry of the central altar. The impact shattered the ancient mortar; cracked limestone blocks gave way in a roaring cascade of slate and stone, pitching forward onto the three nearest cultists. The heavy blocks pinned their legs and chests beneath jagged rubble, knocking the breath from them in ragged gasps.

To the left, a tall figure in a lacquered wooden mask—the mayor's second-in-command—raised a hooked cleaver, but Padraig raised his holy symbol and invoked a blinding flare of divine light. A harsh radiance burst across the cavern, searing the man's exposed eyes; he dropped his weapon with a sharp cry, clutching his face and stumbling into the wall. Behind the broken altar, Osric was already moving through the spray of dust. His fingers darted into the open reliquary niche, scooping up four heavy gold sovereigns and a curved ceremonial dagger of polished silver, capped with a rough-cut ruby at the pommel.

Seeing his vanguard broken in seconds, the mayor turned and bolted through a curtain of spray where a subterranean waterfall poured into a dark fissure behind the altar. As he squeezed through the narrow crevice, a rolled parchment slipped from under his arm and fell onto the wet slate.

Padraig snatched the parchment from the puddle as they tore after him through the roaring curtain of water. Unrolling the sheepskin on the run, he caught sight of ink-drawn dates and crate tallies—a precise schedule detailing consignments of mined black glass destined for an unnamed buyer arriving by sea down the coast.

The fissure opened abruptly into an immense subterranean cavern. Their boots skidded on slick shale at the shore of a vast underground lake. The ceiling was lost in shadows, and a damp, low fog clung to the surface of the black water. Forty paces out, an iron-plated rowing skiff drifted toward the mist. The mayor was at the oars, hauling against the dead weight of the oars with desperate, frantic strokes, his chest heaving as he stared back at the bank.

He opened his mouth to shout something across the expanse, but his words cut short. Around the hull of the iron boat, the dark water began to churn and boil with white foam. A massive, rubbery tentacle, studded with clusters of pale, lidless eyes along its hide, broke the surface of the lake. It rose high into the fog, coiled once around the iron gunwale, and crushed the timber seats like dried reeds. The mayor let out a solitary shriek before the appendage dragged the vessel and its rower violently downward, pulling both beneath the froth into the fathomless water.

The lake settled into stillness, leaving only concentric ripples slapping against the stones of the shore. Clement lowered his hand, his coat dripping with cave water, while Padraig rolled the wet shipping manifest tightly into his belt. Out in the centre of the subterranean lake, the dark water remained entirely flat, hiding whatever lay beneath its floor.