The stairwell ended at a stone arch carved with patterns that made Shen Lu's eyes want to slide away.
Not because it was too bright.
Because it was too precise.
The kind of carving that wasn't meant to be admired, only obeyed.
A pair of lanterns hung on either side, their light an unhealthy blue-green. The air here was warm and damp, carrying layered scents: incense, sweat, iron, sweet wine, and something medicinal that tried to hide the rest.
Voices drifted from beyond the arch.
Not loud.
Carefully contained, like the entire place had been trained not to draw attention from the world above.
Helian Feng stopped at the threshold.
He didn't step through immediately. He watched.
Two men stood beyond the arch as "guards," though they wore no official sash. Masks covered their faces, lacquered and glossy. One was smiling, one was blank.
Both had the same purple star pressed at the brow.
Shen Lu's pendant warmed faintly.
His flame pulsed once, low and alert.
Yuan's voice slid into his mind, cold. Master… everyone here has a leash.
Tang Ye swallowed beside him. "This is… the underworld?"
Pei Xun muttered, "No. This is the lobby."
Gu Li's grip tightened around his satchel.
Xie Han looked amused, but Shen Lu noticed his shoulders were slightly looser than before, the way they got when he was ready to move fast. Like a predator pretending to be relaxed.
Helian Feng stepped through.
The "city" opened up beyond the arch: a long corridor that widened into a cavern-like street carved through rock. Stalls lined both sides, lit by lanterns and spirit lamps. People moved in clusters, masked faces turning slowly as the group entered.
Not with curiosity.
With assessment.
Shen Lu's skin prickled.
He kept his eyes down and his breath even, remembering Gu Li's rules. He could feel his flame reacting to the place, warming in tiny pulses, tasting the air like it had a tongue.
Tang Ye's fox walked with its tail high, utterly unbothered. In Shen Lu's mind it said, Smells like money and blood. Good.
Shen Lu thought back, dry: You're disgusting.
The fox sounded pleased. Yes.
They weren't stopped immediately.
That was worse.
They were allowed to walk far enough to feel watched, far enough to feel the place closing around them like a mouth.
Then one of the purple-star guards stepped forward smoothly, blocking the corridor with a lazy tilt of his shoulder.
"Token," the guard said.
Gu Li's stern gaze flicked to Helian Feng.
Helian Feng nodded once.
Gu Li reached into his satchel and pulled out the wooden box. His fingers didn't shake, but Shen Lu could tell he was angry—at the trap, at the necessity, at the fact that Shen Lu's life was being handled like cargo.
Gu Li opened the box only a crack.
Pei Xun's paper strips hovered close, ready to snap shut if anything flared.
Inside, the wrapped token pulsed faintly.
The guard didn't touch it.
He lifted his hand and drew two fingers through the air, tracing a quick shape—more like a signature than a spell.
The purple star on his own mask glowed faintly in response.
Then the wrapped token glowed too, answering like it recognized a matching stamp.
A quiet click sounded from the air itself.
A barrier unlocking.
The guard stepped aside.
"Entry granted," he said. Then, as if it were an afterthought, he added, "No violence beyond the marked lines. No speaking your true name. No contracts without witnesses."
Pei Xun muttered, "That last one is funny."
The guard's mask turned toward him. "It's law."
Pei Xun's tone stayed dry. "It's comedy."
Gu Li's stern voice cut in, low. "We follow it."
Helian Feng didn't respond. He simply moved forward again, making the others follow.
Shen Lu walked and tried not to look like prey.
It was difficult when the entire underworld was built to sell prey.
They passed stalls that made Shen Lu's stomach twist.
Spirit herbs displayed like jewelry, their leaves still trembling faintly with aura.
Beast cores in glass cases, labeled by stage, price written in neat strokes.
Talisman bundles sealed in wax, the ink inside still moving like it hadn't accepted being paper.
A weapon stall where blades were laid out like fish, their spirit light faint and hungry.
And at one stall, Shen Lu saw a small cage covered with cloth.
Something inside shifted.
A soft, pained sound—too human to be an animal.
Gu Li's jaw tightened hard enough his cheek muscles jumped.
Tang Ye's smile vanished completely.
Even Xie Han's amusement thinned.
Helian Feng's gaze stayed forward, cold and controlled, but Shen Lu could feel his aura sharpening as if it wanted to cut the entire street in half.
Shen Lu's flame warmed suddenly, responding to Shen Lu's anger like it loved it.
Shen Lu forced his breath even.
No spikes.
No feeding it.
He couldn't afford to lose control here.
Pei Xun leaned closer to Shen Lu and murmured without moving his lips, "They're checking you."
Shen Lu swallowed. "How."
Pei Xun's eyes flicked toward a tea stall.
Three masked patrons sat there, sipping calmly. Their attention looked casual, but Pei Xun's paper strips twitched toward them like they smelled ink.
"Contract cultivators," Pei Xun whispered. "They mark targets by reaction. If you look too long, if your qi flares, if your treasure responds."
Shen Lu's mouth went dry.
His pendant warmed faintly again.
Shen Lu pressed his thumb lightly to it through layers, commanding himself to be calm.
Yuan's voice slid into his mind, quiet and cold. Master… the snake can hide. You must also learn to hide.
Shen Lu thought back, flat: I'm trying.
They reached a circular plaza where the ceiling rose higher, supported by carved stone pillars. A massive curtain of black silk hung at the far end, and behind it Shen Lu could hear a murmur like a crowd holding its breath.
The auction hall.
A sign hung near the entrance, written in elegant strokes:
No blades drawn.
No true names.
No grudges carried out on the floor.
Violence is priced separately.
Tang Ye stared. "Violence is… priced?"
Xie Han smiled faintly. "Of course. Everything is."
Gu Li's voice was stern. "Stay close to me."
Pei Xun muttered, "Stay close to Helian Feng. He scares people."
Helian Feng ignored him, gaze scanning the plaza.
Then Shen Lu felt it.
A gaze that wasn't casual.
A gaze that didn't slide away when Shen Lu lowered his eyes.
Someone was looking at him like they already owned the idea of him.
Shen Lu's flame pulsed, warm and uneasy.
He turned his head slightly.
Across the plaza, leaning against a pillar as if he belonged there, stood a young man in a plain cloak.
No mask.
That was the first wrong thing.
The second wrong thing was his smile.
Not wide like the vendor.
Not polite like a messenger.
A small, private curve like he'd been waiting for this exact moment.
Qin Rui.
Shen Lu's blood went cold.
Helian Feng's aura sharpened instantly, lightning qi tightening.
Pei Xun's paper strips lifted.
Gu Li's fingers slid toward needles.
Tang Ye's fox bared its teeth.
Xie Han's fan clicked open, delighted.
Qin Rui lifted two fingers in a lazy greeting.
Then he spoke softly, just loud enough for Shen Lu to hear over the crowd.
"Welcome," Qin Rui said, voice warm as poison. "Now we can talk about what you stole."