The door from the puzzle room shut with the sound of stone grinding on stone and a click that felt final. Like the dungeon had decided it wasn’t letting anyone back through unless something bled first. Kade didn’t look over her shoulder. If the Simulation wanted theatrics, it could get in line. The corridor ahead sloped down at a shallow angle, clean stone giving way to rougher cuts and scattered debris underfoot.
The first fifty feet were uneventful. Just boots on dry stone, dripping weapons, and a heavy silence that made everyone hear their own heartbeat a little louder than they should. Then the torches started to vanish.
Not all at once. Just fewer of them. First, they were spaced every ten feet. Then twenty. Then one on alternating sides only. The ones that remained still burned steadily with the same sickly, fake golden light. It wasn’t dark enough for her eyepatch ability to kick in, which somehow made it worse.
Too much light to see in the dark, not enough to see everything else.
Kade’s eyes swept ahead anyway, tracking corners and shadows like they were part of the terrain itself. The hall bent again after a short stretch, maybe fifty feet, just like the one before. Not enough to call it a pattern, but just enough to make her wonder if the dungeon enjoyed repeating itself when it thought no one was paying attention.
"Think this dungeon fired its interior decorator or something?" Robin said. "Lighting’s inconsistent. Seems like there’s no system. Just… vibe."
"Welcome to the Simulation," Kade muttered. "Half rules, half improv. Dungeon master’s drunk either way."
Mercer slowed at the edge of the next curve. Her hand didn’t go to her weapon, but it wasn’t far. "Got markings."
They clustered around the gouges along the left wall. Faint but deep drag lines and uneven scrapes, curved like something with weight and too many legs, had taken the corner wide.
Myers peered at it, one brow raised. "What do we think? Giant rats? Super hygienic ones with a taste for stone?"
Nobody laughed. Not even himself as the group kept walking.
Levi lagged behind the group by five or six steps, boots dragging just enough to remind everyone he was still there. Robin drifted closer on Kade’s right, her hand loose near the revolver, tone staying mild.
"So. The book. From the crate." Robin started.
Kade didn’t look at her. "We’ll deal with it when we’re out of the dungeon."
"You sure? It might help in…"
"Later," Kade said, sharper now. "We’re not dividing loot before we know who’s alive to spend it."
Robin backed off with a noncommittal grunt, but Kade could see her jaw tighten before Robin moved back further into the group. Not agreement but an acknowledgment that the subject was tabled.
They pushed forward another stretch before the hall opened up. The ceiling arched higher, and the walls widened. Then the team stepped into a shallow antechamber shaped like a flattened dome. Beyond it, visible through a natural archway of stone, was a much larger room. Circular and lit by more of those damned torches but darker still, like the light had to fight just to stay relevant.
At the center of the room was a wide pool, maybe twenty feet across, ringed in low stone like someone had built a well and got bored halfway through. The surface of the water was still.
Kade stepped to the edge threshold and took in the tactical situation. But the room didn’t offer much. The outer edge was cluttered with bodies, both human and drowned. Broken gear littered the floor, which meant no reliable footing, and a wide stone-ringed pool that cut their field into a donut-shaped circle dominated the center. There were no obvious enemies, which only made it worse, because no monsters meant no direction to anchor their defense. Worse still, she couldn’t see the ceiling from this angle, and that turned the entire upper half of the chamber into a question mark. Any attack from above would be blind until it was already landing. The entire space felt wrong. The layout didn’t read like an ambush or a kill box, just open ground with too many unknowns and a stillness that felt more like another trap than a pause.
"Any chance those are real?" she asked, pointing toward the various remains in the next room.
Robin stepped to the threshold, eyes narrowed. "Could be. But I doubt it. When we entered, the Simulation didn’t register any casualties in the instance. These are probably set dressing or monsters that are going to rise when we enter."
"Feels disrespectful, even for a dungeon," Stone whispered.
"No," Briggs grunted. "Feels like bait. Like every other room where we get in, look around, and don’t see an exit."
"There’s a pattern to it," Mercer said. "Theme’s smugglers. First floor’s all ships and hidden cargo and ambush points. Think of this as the cove."
"Would explain the pool," Myers muttered.
Levi piped up from behind. "Water just rippled."
Everyone turned.
"Dead center," he added, pointing. "Just one small ripple. Like something moved. Or... surfaced."
Kade’s hand tightened around the hilt of her cutlass. She didn’t draw it yet. Not until the room decided whether it was going to be polite or not. The smell of salt was stronger here. Not rot, not blood. Just that clean, brine-heavy tang like the edge of a dock before a storm rolls in.
Her mind drifted, unbidden, to Block Island. Magnus the Obliterator. That had been a boss room too. The team had been green back then, green and eager and loud. She still saw half their faces sometimes when she blinked too long. Half a squad shredded in minutes because they’d underestimated the thing that lumbered out of that control room.
This time, she didn’t plan to lose anyone.
"Form up," Kade said. "Standard breach. Tight wedge. Weapons ready."
The team shifted without argument. Lance and Milo moved to point, shields up. Mercer and Robin mirrored each other on the flanks. Briggs took the right rear, warily eyeing the ceiling. Myers stayed loose in the middle. Stone and Levi followed behind, the former silent, the latter visibly sweating.
They crossed the antechamber and entered the room proper.
Nothing happened. Then a slow bubble in the center of the pool as the water boiled.
A single gurgling swell broke the surface, then another. Then, three slick, scaled masses rose in tandem, each one bending with serpentine grace as it stretched toward the stone ceiling and unfolded into view. Heads. Each the size of a warhorse, necks easily fifteen feet long and thick as fallen columns. The scales gleamed like wet obsidian, and eyes like glowing coals tracked the party's movement with inhuman calm.
The leftmost head twisted, nostrils flaring. Steam hissed from its maw, venting to the left in a scalding arc that cut across the chamber toward the nine o’clock position left of there the party stood.
The right head mirrored it, sending another burst of boiling vapor toward the three o’clock. The air warped where it passed, lines bending, moisture searing away midair.
[Analyze] Left Head of Thressyx, The Boiling Crown | Level: 12 Boss | Status: Hostile | Class: Elemental Beast
[Analyze] Center Head of Thressyx, The Boiling Crown | Level: 12 Boss | Status: Hostile | Class: Elemental Beast
[Analyze] Right Head of Thressyx, The Boiling Crown | Level: 12 Boss | Status: Hostile | Class: Elemental Beast
"Positions," Kade said.
The water boiled harder now, sending froth and vapor cascading over the ring of carved stone that rimmed the pool. All three heads of the hydra rose higher, arching upward like dark towers of coiled muscle, each one weaving in slow, counterweighted arcs. The necks moved in tandem at first, tracking the group’s formation like a single nervous system, but it didn’t hold. The rightmost head jerked forward with a sharp twitch, testing their line with a snap of wet jaws that forced Milo to brace and lean into the blow.
The impact cracked loud, shield to fang, and rang across the chamber like a bell.
The left head came next, lunging at Lance in a similar rhythm, and then retreating just as fast. As if to test the pressure.
Kade narrowed her eyes. The heads weren’t attacking randomly. They were probing. Feeling out the formation, working together, and trying to break the line by sheer weight of threat if not force.
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The right head dropped again with a coiled snap and was met mid-surge by Briggs, who didn’t bother with finesse. His axe smashed sideways into the jawline as the thing lunged again, deflecting the strike and chipping a plate of scale off with a crack that made the beast recoil. Myers cut past Briggs on the backswing, ducked under the counterstrike, and buried his long knife just above the creature’s eye before kicking off the head to retreat.
"Right head’s taking it hard!" he called out. "Focus fire!"
Robin’s revolver cracked twice behind them, clean shots that punched through membrane just under the jaw. Mercer mirrored the rhythm, her crossbow bolt slamming into the neck near the gill-line, sending a fine mist of blood arcing over the pool like steam from a cracked pipe.
Kade adjusted position slightly behind Milo and Briggs, staying out of direct line but close enough to see the rhythm. She didn’t waste shots. Not until the right head lunged again, snapping wide and slow from the damage. Then she fired once. The shot punched through softened bone and snapped one side of the jaw completely off.
The hydra screamed. It was like steam howling from a cracked boiler. The wounded head reared back and sucked in a sharp, shuddering inhale. Heat shimmered in the throat, a red glow racing down the gullet like fuel catching fire.
"Get ready!" she barked. "Steam’s coming!"
The right head vented, spewing a cone of scalding mist that burst out at the three o’clock mark and then swept like a moving guillotine toward six. The front line pivoted instinctively, Milo and Briggs breaking left, Colt and Lance taking a beat longer to disengage and swing out of the kill zone.
The rear line scrambled. Robin and Mercer dropped low and rolled wide. Myers cursed loudly and hauled Stone with him by the collar as he cleared the path. Kade turned hard and pivoted along the outer ring, letting instinct and formation training take her legs faster than thought.
Steam blasted across the stone just behind them, loud as a freight line, boiling the floor in long hissing sheets. Stone would’ve been caught if not for Myers. Levi shouted something from the wall, but it was lost in the roar.
Kade didn’t stop to check for injuries, just glanced to see if everyone had moved. That was enough for now.
As quickly as the breath attack had started, the steam stopped. The hydra rotated in the pool, necks adjusting, center head rising higher than the others now before swooping in for an attack.
"Back to wedge," Kade ordered. "Reset at nine. Robin, Mercer, keep pressure on the right. We take that head."
The formation reestablished, tighter this time. The pool steamed with leftover heat, surface still boiling in patches. One of the drowned bodies near the edge had cooked halfway through, skin flayed open from residual scalding.
Colt surged forward. The warhammer wasn’t elegant. It didn’t need to be. He didn’t call out or ask for coverage, just pushed past Lance with a grunt and timed his movement between the head’s erratic feints. The right head reared again, sluggish from damage and off-rhythm from the last barrage.
Colt took the opening. He brought the hammer down from full extension, shoulder turned, hips behind the weight, everything focused into one downward strike. The hammer landed with the sound of wet metal meeting bone. The head didn’t scream this time. It cracked. Like an egg dropped from a height. Bone and scale split wide, the upper skull collapsing in on itself with a hideous crunch.
The neck twitched once. Then again. Then it went still, slumping sideways and crashing onto the outer ring of the chamber with a wet, heavy slap. A hiss followed as blood spilled from the stump, not red, but green-black and smoking.
"Back!" Kade shouted. "It’s caustic!"
Too late. The acidic blood splashed wide, catching Lance across the thigh and Colt across both arms. The armor smoked instantly, steel hissing like water on an engine block.
Lance dropped to a knee, bracing as Stone scrambled to get a spell off.
Colt stumbled back three steps, skin already blistering where the acid had eaten through the jacket.
Kade’s cutlass lit blue in her hand. The air shifted as she activated the cutlass's ability. A pulse rippled from the weapon, silent but sharp, like wind through rigging before a broadside.
Officer’s Command Activated.
+10 to Allied Attack and Morale Rolls (20ft radius)
-10 to Enemy Morale Checks (Immune: Boss)
The effect on the team was subtle. A clarity that pulled the formation tighter focused their efforts as one washed over them like a blanket. Even Myers straightened, knife flipping in his hand again like it had been waiting for permission.
The hydra’s center head turned slightly, neck arcing toward the corpses on the ring. Its eyes caught the body of its own severed twin, and it didn’t scream.
The center head struck again.
It was a sudden downward punch of weight and muscle that moved like a falling crane, aimed directly at Lance’s exposed side. He turned into it as best he could, shield half-lifted, but the acid burn had slowed him too much.
Milo stepped in.
The off-tank slammed into Lance’s flank, shield raised high, catching the brunt of the impact with a full-body block. The hydra’s jaw clamped against reinforced steel, teeth grinding against the edge of the shield in a grotesque screech. Milo staggered back two steps but didn’t fall.
Then, the left head moved to take advantage of the opening.
It darted low, slipping past the clash to strike at Milo’s exposed ribs from the side. The motion of the two heads was so fast and fluid it looked choreographed. Milo pivoted but would not beat the timing. Briggs stepped in a breath before contact, his axe already coming down.
His axe came over in a wide arc, crashing down across the snout of the left head with enough force to snap off a curved fang and spray blood across the floor in a streak. The blow didn’t stop the lunge, but it turned the angle.
Instead of a deathblow to the gut, the teeth raked across Milo’s shield arm. He screamed through clenched teeth and dropped to one knee, blood pouring down from just above the elbow. The shield stayed strapped to his arm but hung low now, the edge cracked and steaming from the earlier acid exposure. He was still upright, barely, but that wouldn’t last if someone didn’t cover him.
Behind the line, Robin had taken three steps back, dropping into a kneel behind Mercer as she pulled open the cylinder on her revolver and began reloading. Her expression was all business.
Then the heat shifted again.
The center head drew back, jaws parting wide as its throat glowed. Kade saw the shimmer, the rise in temperature as the air thickened near the stone, and didn’t wait for a command.
"Fall back! Twelve o’clock!"
Steam vented in a solid line from the center head, hissing across the stone in a widening cone from the six o’clock position. Everyone scrambled. Lance half-carried Milo as they backed off, Myers looping around them and keeping the heads in his peripheral vision. Mercer broke for the edge of the chamber.
Levi ran. Just turned and bolted around the ring’s edge, boots slipping once on the wet stone as he abandoned Colt without a word.
Colt tried to move but collapsed after two steps, arms still red and raw from the acid splash, his warhammer dragging limply behind him like a dead limb. Kade changed course mid-stride, her boots skidding across slick stone as she cut wide around the spray zone.
She reached Colt just as the mist crept toward them.
"Move!" she barked, grabbing under his good arm.
He started to say something, but the breath attack closed in, and they both went. Her greatcoat flared behind her, catching the edge of the blast as they cleared the outer circle.
Steam clawed at her back and kissed her cheek with the heat of a forge. It didn’t stop her.
They crashed behind the new line at twelve o’clock. Kade shoved Colt down into cover behind the skirmish line near Stone and dropped to a crouch beside him, one side of her face raw and red from the scalding.
The coat had taken most of it. Not all.
Robin clicked her cylinder shut and stood.
"Ready."
"Then hit it," Kade said.
The center head had followed their movement. It pivoted toward the twelve o’clock position, pulling itself upright as it prepared to strike again.
Mercer’s crossbow snapped up and fired.
The bolt lanced into the hydra’s right eye socket, vanishing with a wet pop and a short stream of blood. The head screamed, twisting and thrashing hard enough to kick up waves across the pool. It staggered sideways, temporarily blinded and enraged.
Kade didn’t wait. She rose to a half-stand, adjusted her stance, and fired.
Robin shot at the same time.
Their bullets cut through the air with synchronized force, small-caliber precision built for short-range kills, both rounds hitting the open mouth just as the center head reared back in pain. One punched through the soft palate, the other directly into the back of the throat.
The beast's spine arched, and for a heartbeat, the room fell still. Then the center head collapsed, slamming into the edge of the pool like a dropped pillar. Stone cracked. A wave of brackish water lapped over the ring and splashed across the floor. Blood followed from the slain head, but hadn't splashed about as with the first head's death, making it trivial for the group to avoid the acid. Whatever reaction powered the acid was already failing with each additional fallen head.
The center head of Thressyx was down. One more to go.
The left head reared up and shrieked. With the others gone, it had lost the rhythm, the coordination that made the hydra more than just a tangle of scaled meat. What remained was raw force driven by fury as it went into a berserker state.
The wounded tanks still held the line, a bulwark barely holding against the pressure, but Kade could already see the cracks forming. They wouldn’t last much longer.
Milo stood to the left, shield raised halfway, shoulder braced against the shield more for support than an actual defensive stance. His bleeding had slowed, thanks to Stone’s healing, but he looked like a man three minutes from collapse. Lance wasn’t much better. His acid-warped leg armor hung crooked across his thigh. Even so, they stayed in position.
Briggs stepped forward, loose from the formation, with no shield to anchor him. Just his axe, both hands, and momentum. He struck hard and fast, testing the head’s movement with feints before slamming a wide chop into the beast’s lower neck. The edge bit deep, lodging between tendons.
The hydra twisted as it roared again in fury and lashed sideways.
Myers darted in at the wrong moment. Maybe he thought the head would snap back, maybe he saw an opening to follow up Briggs’ strike. Either way, he didn’t make it. The head clipped him mid-step and sent him flying.
Kade saw him tumble across the stone and vanish behind a cluster of broken, drowned bodies near the wall, one boot spinning off in the opposite direction. She didn’t have time to check whether he was breathing.
The head wheeled back toward Briggs with a lunging strike, all weight and teeth and muscle. Briggs didn’t move. He braced for it, teeth bared, grip tight.
Kade triggered her blade whirl ability.
The cutlass came up fast. It wasn’t elegant or beautiful. It was brutal. She stepped into the lunge, pivoted past Briggs’ shoulder, and drove the first strike across the side of the hydra’s jaw. The second sliced higher, near the eye. The third angled down across the joint behind the skull. She kept moving, cutting deeper with each pass. The steel hissed through scale and bone, leaving arcs of blood in the air like someone had torn open a pressurized pipe.
The beast reared back, howling, providing Mercer with the perfect shot. She took it and then followed up with another.
Two bolts hit in rapid succession, burying themselves near the base of the head. Not deep enough to kill, but enough to stagger it. The hydra thrashed, legs failing to push it forward now. What strength it had left bled out with every movement.
It dropped low, chin dragging on the stone. Briggs stepped forward and raised the axe one last time. The swing came down like a closing statement to put the beast out of its misery.
The head slid sideways, muscle twitching, blood pooling out across the stone in thick globs that sizzled. The last of the heat had gone with the breath. All three heads were down.
Kade lowered her weapon, shoulders still locked as if the fight hadn’t ended. Her jaw ached from clenching, a slow pulse of pain she hadn’t noticed until now. Across the chamber, Levi hadn’t moved. Myers was still down.
They’d won. But it had been messy as hell, and nowhere near easy.

