Chapter 3 – The Law of the Trade

The inverted forest is a graveyard of petrified wood and glowing, parasitic moss, clinging to the underside of the world. Gravity pins us to the cavern roof, while the molten core of the inner sun burns like a merciless, lidless eye in the abyss overhead.

I navigate the sheer, vertical drops of the root-system without a single misstep. My boots find the narrowest ridges of damp ironwood, my center of mass auto-correcting with a fluid, terrifying precision. I try to force a stumble, deliberately placing my heel on a patch of slick lichen, but the stolen equilibrium compensates before the thought even fully registers. My spine aligns. My hips pivot. The alien perfection of the movement makes my stomach turn. I am walking with the grace of an apex predator, trapped in the body of an engineer.

Ahead of me, Nhal moves with grim, methodical slowness. The guardian of the hanging city is currently a man fighting a war against my broken knee. Every step he takes is a negotiation with the phantom ache of crushed bone—a pain that belongs to me, etched into his nervous system by the gravity flip. He doesn’t ask for a halt. He simply bears it, his broad shoulders tight under his dark tunic, his golden eyes scanning the dense, upside-down canopy.

He stops beside a cluster of swollen, pale-purple fruit growing from a fractured stump. Reaching out, he snaps one off the branch. He doesn’t smell it. He bites straight into the fleshy rind.

Instantly, he flinches, his jaw locking. He drops the half-eaten fruit into the glowing moss and presses the heel of his hand hard against his temple.

"Poisonous?" I ask, my hand instinctively dropping to the heavy compass chained to my belt.

"Loud," Nhal rasps, his voice a low, grating vibration in the quiet damp. He squeezes his eyes shut. "The bitterness. It is a blinding, deafening yellow. It rings in the teeth."

I stare at him. The fruit sits in the dirt, oozing a clear, odorless sap. "Taste doesn’t have a color or a sound."

"Yours doesn’t." Nhal opens his eyes. The vertical slits of his pupils are blown wide, trying to filter out a sensory overload I cannot perceive. "Mine is a mosaic. Two hundred years of anchoring the tides. Two hundred trades. I have taken the sight of a dying miner, the hearing of a terrified architect, the thermal sensitivity of a child who fell from the upper tiers. The senses do not stack cleanly, Daro. They overwrite. They bleed into one another. I no longer remember what water tastes like to a serpent, only that it currently feels like cold static."

He leans his weight against the ironwood trunk, favoring my ruined leg, his breathing shallow. The sheer magnitude of the engulfment hangs in the air between us. He isn’t just a monster. He is a walking archive of stolen humanity, drowning in the borrowed perceptions of ghosts.

"If it tears you apart," I say, my voice flattening to hide the sudden, sharp spike of guilt in my chest, "why not just take what you need? You had me pinned in the air. You could have stripped my equilibrium without a word. Why wait for the eye-lock? Why let me choose?"

Nhal’s golden gaze snaps to mine, suddenly devoid of exhaustion. The temperature in the small clearing drops. The air grows heavy, pressing against my eardrums with the barometric weight of the deep crust.

"Because a theft breaks the anchor," he says, every syllable striking like a hammer on an anvil. "The hollow world does not accept a stolen toll. To reverse a localized shear, to bend the physical law of a planet, the transaction must be absolute. The witness must look into my eyes, understand the exact price of the sense they are surrendering, and hold the gaze."

He takes a slow, limping step toward me. The ambient heat radiating from his skin brushes against my coat.

"If I force it," Nhal continues, his voice dropping to a dangerous, intimate murmur, "if I deceive you, or if you flinch and withdraw consent while the tide is turning, the gravity shear will tear us both down to the atomic level. It is a trade, Daro Senn. An unyielding, irreversible contract. I cannot take what you do not willingly give, and you cannot ever take it back."

The absolute rigidity of the rule settles over me. The hanging city isn’t protected by a beast of pure destruction. It is kept alive by a system of brutal, localized sacrifice.

Nhal turns away, the sudden intensity bleeding out of him as he gingerly lowers himself to the mossy ground to build a small fire from dry lichen. I watch him massage the scarred tissue of my old injury. He is preparing to anchor the largest gravity tide in a century, a flip that requires him to surrender his sense of touch—his last tether to the physical world—and he is doing it while carrying the accumulated agony of a hundred strangers.

I sit across the glowing embers, the silence stretching out, thick and heavy. For the first time since being abandoned in the dark, I don’t calculate my escape route. I just watch the guardian trace the lines of a pain that I gave him.

Then, the heavy canvas of my coat vibrates.

I freeze. The sensation is faint at first, a rhythmic, mechanical pulse against my ribs. I slip my hand into my inner pocket, my fingers closing over the cold brass of the surface-issued compass.

It is ticking.

Not vibrating with the erratic hum of the earth’s tectonic plates. It is a steady, synthesized beat. Tick. Tick. Tick. Exactly one beat per second. The needle is dead locked, pointing straight up toward the molten core of the inner sun.

The heat drains from my face. A natural gravity tide does not keep a perfect, mechanical rhythm. The surface authorities hadn’t given me an instrument to measure the subterranean shifts. They had given me a receiver.

The device is counting down. It is waiting. And someone, miles above us in the safety of the crust, has just armed the signal.