Ivale and six of the security team descended the ladder, one by one. Panair waited until the last of them were down before he gestured for the Unifier to lead them onward.
The shadowed corridor was one continuous archway extending toward a second drop. The Unifier took them down another rope ladder and down a second corridor toward a brightly lit arch. Shadows drifted silently past them and Avir felt them like a weight sliding across her skin.
The archway opened into a chamber. Avir's gaze slid over the more ordinary ruins—the empty tables and rotted chairs. It caught for a moment on the banks of empty sockets and gleaming stones. Then it swept the room, trying to take in everything at once. She saw tanks of gelatinous matter bulging from the walls. Bundles of capillary-like tubes pressed against the chamber's walls. Blobs and nodules of silicate, all seamless, held viscous liquids that rippled like the shadows in the corridor did. Star-shaped patterns pressed against the skin of what could have been a table. Nerves. The liquid pulsed in the smooth bank of empty sockets against the far wall as if controlled by a heartbeat.
There was no question of it in Avir's mind. This place was alive.
Avir felt her own breathing become shallow. "How big is this place?" she asked, not caring about the hushed tone the Unifier couldn't possibly miss.
"I don't know," he said. "I've mapped out about ten square kilometers' worth of tunnels. Not that it's done that much good." There was a smirk in his voice. "Half the stuff back of the walls and tanks didn't even show up until we'd had the lights on twenty-four hours. And you should see what's down there." He nodded to a second archway.
"Ivale, see what you can find out about this place," she said, already halfway to the other arch and barely aware that the two Security Beholden had closed ranks to follow her.
Avir knew she was letting herself get distracted. Exploration should wait until they had the proper personnel, but she kept right on going. There was no light, except what was at their backs. One of the Beholden raised a hand lamp to light her way.
Ahead, the corridor curved. A burst of red light flashed off the smooth, clear walls. It flashed again, and again. Avir's steps quickened. The footsteps of the Security Beholden echoed as they marched behind her.
She rounded the curve and the pulse of light hit her right in the eyes. Dazzled, she dropped her gaze and raised her hand. She saw the reflection of another flash on her own boots. The shadows under the surface of the corridor roiled as if in response. The intensity of the light faded as her faceplate darkened.
At last, Avir could look up again. She stood less than a meter from a cavernous opening. The corridor came out near its ceiling, but the floor, if existent, was invisible. The far wall was likewise lost in shadow. From darkness to darkness stretched more of the Ancestors' veins. Avir knew they must be enormous, but the cavern around them made them look like silken threads. They crossed each other and spread out again at every angle. It was a geometrician's dream. It was the work of a thousand spiders over a thousand years. The ruby light flashed down the threads like bottled lightning. A single strand flashed on the edge of her line of sight. A dozen lit up right in front of her. Ten meters below, five, now ten, now twenty, horizontal strands pulsed with light and then blacked out all at once. Pulses of light raced up and down the verticals, chasing each other through the network of threads.
Peripherally, she noticed a platform in front of her, obviously made for movement into the vast network. Flat balconies and bubbles that could have enclosed rooms were supported by the threads. This was a complex. People, the Ancestors or the artifacts, traveled into the heart of this gigantic web of light and…did what?
"There is yet more work in the heart of the Ancestors. May those hearts be revealed to me. May my eyes see the wonder of the work…" It took Avir a moment to realize her voice was reciting the Second Grace. She closed her mouth but her eyes couldn't stop straining to measure and define the impossible wonder spun out in light and glass in front of her.
Then her heart began to thud heavily against her rib cage. It was too much. It was too big and too incomprehensible. As precisely as she could manage, she turned around and shouldered her way between the Security Beholden. The ruby light pulsed and flickered against the corridor's curved walls, each beat raising the level of unreasoned panic inside her. She didn't dare run, but she didn't know how she'd hold herself to a walk.
They were in a hollow world. A hollow world with veins and nerves, and who could know what else. But it lived. She knew that with an utter certainty. Like the artifacts that grubbed on its surface searching for their lost function, it lived.
Avir almost gasped with relief when she crossed the thresholds into the first chamber again.