The corridor narrowed as they moved deeper, the blue radiance thickening until it felt almost liquid against the skin. Murals continued along both walls—some intact, others fractured by time or violence. In one panel a Thin One stood with arms outstretched while constellations poured through their body like rivers. In the next the same figure knelt, head bowed, as two vast shadows closed around them like jaws.
Lior's fingers brushed the stone without thinking. A faint warmth answered, then faded.
"Don't touch everything," Nyx murmured from behind. "Some of these walls still remember how to bite."
Kael raised a hand. The group halted. Ahead, the corridor opened into a circular chamber whose ceiling had long since collapsed into the bruised sky. At its center rose a dais of black glass, and upon the dais rested a single object: a fragment of the same luminous material that had once formed the orb guiding Lior. It pulsed slowly, weakly, like a heart that had nearly forgotten how to beat.
Seris drifted forward. The glow beneath their hood brightened in recognition.
"This is what remains of the previous Thin One's anchor," they said. "A piece of the boundary itself, shaped into something that could be carried."
Lior stepped closer. The pull in his chest answered the fragment's pulse, matching it, strengthening it. Light gathered along his veins again—not the sharp flare of panic, but a steady, reciprocal glow.
Kael's voice was low. "If you take it, the ruin will know. And whatever has been sleeping here will wake fully."
Nyx tilted their head, studying the fragment with uncharacteristic seriousness. "Or we leave it and walk out the way we came. Assuming the door still likes us."
Lior looked at the three of them in turn. Kael's stillness was absolute, a wall waiting to be tested. Nyx's usual grin had thinned into something sharper, more honest. Seris simply watched, offering neither permission nor warning—only presence.
He reached out.
The moment his fingers closed around the fragment, the chamber exhaled.
Every symbol on the walls ignited at once. The black-glass floor trembled. From the broken ceiling, threads of shadow began to pour downward—not the mindless hunters of the open plain, but denser, more deliberate shapes that carried the weight of old memory. They did not shriek. They whispered.
Lior staggered as the fragment's light flooded his arm, racing up to his shoulder, then settling into a second heartbeat beside his own. Images flashed behind his eyes: a figure much like himself standing on this same dais, choosing to seal the boundaries at the cost of never returning home. The choice had held for a long time. Then the seals began to fray. The hunters returned. And the Thin One's final act had been to hide this fragment where only another of their kind could find it.
The visions ended. Lior dropped to one knee, gasping.
Kael was already moving, spear sweeping in wide arcs that tore the denser shadows apart before they could fully form. Nyx vanished into motion, daggers flashing wherever the darkness tried to coalesce near Lior. Seris raised both hands; the blue flame from the original chamber appeared above the dais, expanding into a protective dome that pushed the worst of the shadows back.
"Lior!" Kael's voice cut through the chaos. "The fragment is yours now. Use it or it will use you."
He forced himself upright. The second heartbeat steadied. Instead of fighting the new power, he did what the training had taught him—made space for it, invited it on his own terms. Light unspooled from the fragment in controlled ribbons, weaving through the air like living thread. Where the ribbons touched the denser shadows, the shapes unraveled into harmless motes of ash that drifted upward and vanished into the open sky.
The chamber quieted by degrees. The remaining shadows withdrew into the cracks of the broken ceiling, reluctant but no longer aggressive. The symbols along the walls dimmed to a soft, watchful glow.
Nyx exhaled and sheathed both daggers in one fluid motion. "Well. That was educational."
Kael lowered his spear but did not relax. "You stabilized it. Barely."
Seris approached. The protective dome dissolved into sparks that settled around Lior's shoulders like a temporary cloak. "The previous Thin One left this so the next would not begin empty-handed. You carry a piece of the boundary now. That makes you both stronger… and more visible."
Lior looked down at the fragment resting in his palm. It no longer pulsed separately; it had synchronized with the rhythm already living in his chest. "What happens if the hunters find me like this?"
Seris's voice was quiet. "They will not merely hunt. They will try to unmake the boundary through you."
Nyx clapped him lightly on the shoulder. "Cheerful as always, Seris. Come on, star-boy. We should get back before the outer plain decides it misses us."
Kael led the way toward a different exit—one that Seris opened with a gesture rather than waiting for Lior's resonance. As they stepped out onto the black-glass expanse once more, Lior felt the fragment's quiet presence settle deeper, no longer foreign.
Somewhere far behind them, in the secondary ruin, a single remaining mural flickered to life for the first time in ages.
It showed two Thin Ones standing side by side beneath a sky of moving stars.
And the stars were watching more closely than before.