He had kept this refuge afloat through relentless calculation, yet the upper-tier refugees were gouging out the very cork-wood that provided buoyancy, gutting core support for a fool's raft atop scalding slurry. Nim-Rua’s dry wheeze scraped the air from her cot by the ballast tank. He had rationed against her weight; he would not let their panic nullify his arithmetic. He didn't waste a second. He snatched a heavy iron pry bar from its rack beside the main pressure gauge, its weight a familiar comfort in his grasp. The climb to the next tier ran up a narrow shaft, brass rungs slick with condensate and grit. He took them two at a time, the bar clinking against the metal uprights. Above, splintering timbers cracked over frantic shouting. The ziggurat groaned beneath his boots, a low vibration humming up the marrow of his shins. When he burst through the sealed hatch into the second tier, the scene was chaos. Several figures, faces streaked with grime and sweat, were hacking at the ornate cork-wood paneling, ripping away the finely carved reliefs that once depicted the ascent of the Coral-Caste into the sun-drenched peaks. Splinters flew through the air, glinting in the faint light filtering through the grime-caked vent shafts. The air was thick with the acrid scent of scorched wood and desperate fear. A portly merchant wrenched at an upright timber, deaf to the torque wrenching the ceiling beams out of true. “Stop!” Yutika’s voice, hoarse but surprisingly strong, cut through the din. She stood near a gaping hole in the wall, her fine robes torn and smudged, trying to physically block a gaunt woman named Jevva from attacking another section. “You’ll collapse the level! We’ll all be submerged!” Keral turned, his eyes wild. “Better a chance on a raft than to sink with this madman’s coffin!” He gestured vaguely at Batzal, who now stood silhouetted in the hatchway, the pry bar held ready. “He’s leaving us to boil! We must save ourselves!” “Save yourselves by destroying the very thing keeping you alive?” Batzal’s voice was flat, devoid of emotion, yet it cut through their panic like a surgeon’s blade. “You are gutting the vessel's displacement. Every beam you gouge out brings the waterline up two inches. That isn't a raft; it’s kindling for your own scalding.” He swept his gaze across the terrified faces. “And you, Yutika, still cling to the illusion of order amidst chaos?” His tone was a lash, despite her efforts. “Your Coral-Caste brethren are proving themselves no different from the panicked vermin of the under-slums. Their 'wealth' has rotted their minds, leaving them incapable of basic structural comprehension.” “They’re terrified, Batzal!” Yutika retorted, pushing Jevva away from a weakened section. “We’re all terrified! Tell them there’s another way! You always have a contingency, don’t you? Some secret measure you’ve held back, some final equation that saves us all?” Her gaze, usually so disdainful, now held a raw, pleading desperation. “Is there anything left?” Batzal’s eyes narrowed. He had observed Yutika’s transformation over the past days, the slow erosion of her haughty demeanor. This was a new Yutika, forged in the crucible of absolute peril. And she was right. He always had a contingency. A final, drastic measure. He gestured with the pry bar toward the ceiling. “There is one. The apex sheath.” Keral scoffed. “What good is the roof? It’s solid brass!” “Precisely,” Batzal said, his voice gaining a cold, technical edge. “The thermal brass lining the roof beneath the upper spire was cast to reflect midday glare. It adds nearly six hundred Mokharan pounds of dead ballast.” A murmur rippled across the room, but Batzal kept his stare on Yutika. “It was always a reserve buoyancy measure. An additional mass that could be jettisoned if all else failed. Removing it would lighten the burden by a significant margin, raising us several Eklan-widths.” Yutika leaned forward, calculating. “Six hundred pounds… that buys us time.” “It buys another day, perhaps two,” Batzal said. “Enough to clear the caldera. But stripping that metal opens the upper ceiling directly to volcanic steam. This tier will become an unbreathable kiln. Worse, the hinge bolts are wedged on the outside.” The nobles drew back into the shadows. “Outside?” Jevva whispered. “The vapor... the sulfur... it will strip the skin off our ribs!” “It’s a certainty of survival for those below, if done correctly,” Batzal stated, his gaze unblinking. He didn’t offer to do it himself, nor did he ask for volunteers. He simply presented the facts, the cold, brutal physics of their existence. Silence descended, thick and suffocating. No one moved. No one spoke. The sound of distant gurgling from the mud outside seemed to intensify. Then, Yutika stepped forward. Her head was held high, a resolve hardening in her features that Batzal had never seen before. “I will go with you,” she said, her voice steady. “You know the structure. I… I can follow instructions. I can help strike the latches.” Batzal studied her, a flicker of something akin to surprise, or perhaps a grudging respect, crossing his face. “Very well,” he said, a note of finality in his tone. “Gather what tools you can. We’ll need mallets, a pry bar, anything heavy enough to dislodge rusted brass.” He pointed toward an iron hatch dog-bolted into the uppermost bulkhead. “That opens onto the slope.” Minutes later, armed with a heavy maintenance hammer and his own pry bar, they stood before the hatch. The air around it shimmered with heat. Batzal gave Yutika a quick, precise instruction on how to secure herself once outside, how to move on the slippery, mud-caked roof. He dropped the dogged hatch behind them. Outside, white steam scorched down his throat with a taste like roasted tin. The brass slope was buried under a gray scum of baked silt, slick where condensation pooled in the rivets. Heat pulsed off the bubbling slurry ten yards below, turning the horizon into a wavering smear. They crawled toward the central seam of the upper skin, blistered metal burning through their calluses as the caked crust broke away. Batzal tested each rivet before putting his weight onto his palms. Yutika crawled close behind, jaw set, tracking his knee-prints in the silt. Halfway to the first release dog, the timber frames below shivered. It wasn’t a distant geyser this time, but a fundamental shift in the tectonic plates beneath them. The structure groaned, a tortured shriek of protesting metal and cork-wood. Batzal instinctively flattened himself against the roof, clinging to a raised rivet. He glanced over, his eyes wide in the steam. Yutika, caught off guard, had lost her footing. Her hands scrabbled uselessly against the slick mud crust. Her body began to slide, slowly at first, then picking up speed, inexorably, towards the boiling tide below.

The Cost of Survival