They didn't return to the main roads.
Helian Feng kept them moving across half-wild terrain, cutting through bamboo thickets and shallow gullies, always choosing the path that looked inconvenient enough to discourage pursuers.
It didn't discourage Shen Lu's thoughts.
The word space sat in his chest like a stone.
Not because the others had reacted badly. They hadn't. Not really.
Tang Ye had looked awed. Gu Li had looked worried. Pei Xun had looked irritated, like secrets were extra work. Xie Han had looked delighted, which somehow felt like the most dangerous reaction of all.
Helian Feng had looked… controlled.
And that control was what unsettled Shen Lu.
Because Helian Feng didn't explode.
He didn't accuse.
He only filed the fact away like a law he would enforce later.
Shen Lu's flame pulsed quietly with each steady breath. He kept it contained the way Gu Li had drilled into him: even breathing, no spikes, no feeding it emotion.
Yuan's voice was a cold whisper in the back of his mind. Master, the thunder disciple is thinking too hard.
Shen Lu thought back, bitter: He always does.
Yuan sounded amused. So do you.
Shen Lu didn't answer.
By late afternoon, the land changed again.
The grass thinned. The rocks grew darker. The air carried a faint mineral scent that reminded Shen Lu unpleasantly of sealed doors and formation lines.
Pei Xun noticed it first.
His paper strips slid out, hovering like nervous fish.
"This isn't natural," Pei Xun said.
Gu Li's eyes narrowed. "A hidden formation field."
Tang Ye frowned. "Like a boundary?"
Xie Han smiled faintly. "Like a welcome mat."
Helian Feng stopped and scanned the ground.
Shen Lu followed his gaze and saw it: faint scuff marks in the dust, not random foot traffic, but repeated patterns. Like people walked here often, but never openly.
A path that looked unused… because someone wanted it to look unused.
Gu Li's hand tightened around the small wooden box in his satchel. The one holding the wrapped token.
The box felt heavier than it should.
Shen Lu could tell from the way Gu Li held it like a patient that might bleed.
Tang Ye's fox sniffed the air, then spoke into Shen Lu's mind, voice sharp and pleased. Underneath.
Shen Lu's skin prickled. "Underneath what."
The fox's tail flicked. Underneath everything. Where people hide their hunger.
Tang Ye whispered, uneasy, "My fox doesn't like this."
Pei Xun muttered, "Your fox doesn't like anything."
Tang Ye shot him a look. "He likes me."
Pei Xun's tone stayed flat. "That's unfortunate."
They moved forward slowly.
The air pressure changed by a hair, like stepping into a room with closed windows. The faint mineral scent sharpened.
Then Gu Li stopped abruptly.
His stern face tightened.
He reached into his satchel and pulled out the wooden box.
Pei Xun leaned closer, paper strips hovering. "Don't open it."
Gu Li didn't open it. He only held it.
The box vibrated faintly.
Not physically.
With qi.
Shen Lu felt the flame inside him warm slightly, reacting like it recognized a pull. The pendant warmed too, faintly hungry.
Shen Lu's stomach turned.
Helian Feng's gaze snapped to Shen Lu immediately. "Your pendant is reacting."
Shen Lu's jaw tightened. "I'm not doing it."
"I didn't say you were," Helian Feng said, voice flat. "I said it's reacting."
It sounded like a correction, not an accusation.
Which somehow felt worse.
Gu Li's voice was stern, clipped. "It's pulling."
Xie Han's smile sharpened. "Good. It's showing us the door."
Tang Ye swallowed. "A door to the underworld?"
Pei Xun muttered, "Obviously."
Helian Feng held out his hand. "Give it to me."
Gu Li hesitated.
It was small, but Shen Lu saw it.
Gu Li didn't hesitate because he distrusted Helian Feng.
He hesitated because he distrusted what the token might do to whoever held it.
Gu Li's jaw tightened. He handed the box over.
Helian Feng held it at arm's length like Pei Xun had, posture steady, aura cold and controlled.
The vibration intensified.
Then the ground ahead shimmered.
Not with heat like the fracture.
With a thin distortion like water over stone.
A concealment array.
Helian Feng lifted his sword and drew a thin line of lightning qi across the shimmer.
Not a strike to destroy.
A cut to test.
The concealment rippled.
And a section of ground "opened" into visibility: a stone stairwell descending into darkness, framed by black rock and carved with faint patterns that made Shen Lu's eyes ache if he stared too hard.
A hidden entrance.
Tang Ye whispered, "That's… real."
Xie Han's eyes gleamed. "Finally."
Pei Xun's face was tight. "This is too clean. Too prepared."
Gu Li's voice was stern. "It's a trap."
Helian Feng's gaze stayed on the stairs. "Yes."
Shen Lu swallowed. "Then why are we—"
Helian Feng cut him off, calm as a verdict. "Because they will follow us until we enter somewhere. Better we choose the door than let them choose it for us."
Shen Lu's throat tightened.
He hated how right that sounded.
The stairwell breathed cold air upward, smelling of damp stone and something faintly sweet—like incense trying to pretend it wasn't poison.
Pei Xun's paper strips lifted higher. "Contract arrays."
Gu Li's fingers slid toward his needles. "Stay close."
Tang Ye's fox stepped forward first, tail high again, as if it had been waiting for this. In Shen Lu's mind it said, Don't be slow.
Shen Lu's mouth twisted. "You're excited."
The fox replied smugly, Always.
Helian Feng looked back once.
His gaze landed on Shen Lu.
Not soft.
Not gentle.
But steady.
"You don't touch anything," Helian Feng said. "You don't speak first."
Shen Lu's jaw tightened. "I remember."
Helian Feng held the wooden box out to Gu Li again. "Keep it sealed. If it reacts, tell me immediately."
Gu Li nodded once, stern as ever.
Pei Xun muttered, "If we die, I'm haunting all of you."
Tang Ye managed a shaky smile. "If we die, you'll complain even as a ghost."
Pei Xun replied, "Correct."
Xie Han flicked his fan open, eyes bright. "Try not to die, then. It'll be inconvenient."
Helian Feng stepped onto the first stair.
Cold air wrapped around his boots.
Shen Lu followed, throat tight, flame pulsing quietly under his ribs.
Step by step, they descended.
The light above shrank into a thin rectangle.
The darkness below swallowed sound.
And the stone under their feet felt too smooth, too used, as if many people had walked down these stairs with the same mixture of dread and desire.
Halfway down, the air changed again.
It grew warmer.
Not from fire.
From bodies.
From lanterns.
From life hidden underground.
A faint murmur drifted up—voices, distant and layered, like a market running beneath the earth.
Shen Lu's heart thudded.
The underground auction.
It was real.
It was close.
And the token in Gu Li's box vibrated faintly, as if pleased to be coming home.