Chapter 1: Green Rust Awakens

As Ad vaulted over the collapsed concrete beam, the rubble crunched beneath his feet, kicking up a cloud of choking dust. When his fingertips brushed against the filter cartridge—rusted to a dull, dark brown—a searing pain, like that of glowing embers, shot up his arm and into his palm. He pulled his hand back by reflex. At that precise moment, the noxious haze permeating the surroundings strangely dispersed, revealing a small pocket of clean air amidst the ruins of Lagos.

The filter cartridge hummed at his feet. The sound was not the mechanical vibration of gears or pistons, but something older—like a primitive drumbeat, low and rhythmic, rising from some unfathomable depth below, resonating directly within his bones.

He crouched down, hesitant to touch it again. Instead, he carefully extracted a pair of tweezers from his medical kit and picked up the cartridge with meticulous care. The surface was etched with intricate patterns that shimmered with a faint metallic luster in the dim light. The lines resembled veins, or perhaps a dried river delta, weaving together into geometric shapes that induced vertigo. Suddenly, a fragment of memory that didn't belong to him surged into his mind—*ecosystem reconstruction*—contract, cost, progressively increasing. The words zipped through his brain like electric currents. He pressed his hands to his temples, wincing in pain, forcing down the intense dizziness. With trembling fingers, he wrapped the cartridge in a dust cloth and tucked it tightly against his chest. The humming beneath the fabric persisted, as if urging him to move forward.

The warehouse at the port reeked of damp mold and rust. Zola sat in the shadows, her blind eyes turned toward the entrance, her posture rigid and still.

"You've brought back a stone that breathes." Zola’s voice was hoarse, echoing in the vast, empty warehouse.

Ad paused, his back to her, straightening his dust-coated jacket. "It's just scrap metal."

Zola laughed. The sound was dry, like a twig snapping. "Scrap metal doesn't make the tip of my cane run hot." She rose slowly, leaning on her blind cane, which was carved with mysterious sigils. She tapped the head of the cane toward Ad’s chest; the movement was sluggish yet terrifyingly precise. "It's in your pocket, like a seed that has just awakened, restless and agitated."

Ad said nothing. He turned and walked into the inner room. The heavy wooden door clicked shut behind him, the lock snapping into place. Only after ensuring no one was peering in did he place the filter cartridge on the mottled wooden table. The cartridge vibrated gently, and a thin strand of pale green light seeped from the rusted cracks, looking uncannily eerie in the gloomy room. The persistent, sour decay in the air was sucked into that glow, and what was expelled was the fresh scent of grass after rain. He picked up a cracked medicine bottle and cautiously guided the stream of energy toward it. The glass at the edges of the crack began to melt and heal, like water flowing backward, the transparent luster re-covering the rough cross-section. A layer of silver-gray powder precipitated at the bottom of the bottle. He scraped a bit with his fingernail and brought it close to his eyes—it was metal, trace amounts of copper and iron, twinkling with fine glints under the light.

He stepped back two paces, staring at the bottle and the cartridge, his breathing growing heavy. Energy could solidify matter, alter structure. The thought sent a chill down his spine, yet his heart raced with excitement. He grabbed a broken pen and quickly scribbled on a crumpled page: energy output, solidification threshold, material reaction. His handwriting was messy, but each stroke was exceptionally cautious, as if writing even one more word might disturb some forbidden thing.

There was a pounding on the door; the metal sheets screeched under the impact. Kenny’s voice came through the barrier, unmasked by greed. "Ad, open up. I know you found something good."

Ad took a deep breath, stuffed the filter cartridge into the hidden compartment under the bed, and then pulled the door open. Kenny stood outside, his shirt collar wide open, revealing his muscular arms. A gold chain on his neck glinted dazingly under the yellow streetlights outside. "Fifty thousand naira. Give me the thing."

"What thing?" Ad’s face was expressionless, his hand gripping the doorframe tightly.

Kenny narrowed his eyes, scanning Ad’s body like a searchlight. "Cut the act. My guys saw you coming out of the pharmaceutical plant ruins, clenching something in your hand. That filter cartridge, old man, is valuable. On the black market, that tiny bit of energy is enough to buy half a street block."

Ad blocked the doorway, lowering his center of gravity. "Not for sale."

Kenny laughed, flashing a mouthful of gold teeth; the expression was menacing. "Not for sale? Then forget about getting your medicine supply from my docks from now on." He turned and took two steps back, his leather shoes crunching on the gravel, then looked back over his shoulder, his gaze cold. "Think it over. Come to my warehouse. Don't make me send people to find you."

Ad closed the door and leaned his back against the cold metal, feeling a tightness in his chest. He looked down at the row of scrapped medicine bottles—cracked, chipped, deformed—piled in the corner like garbage abandoned by the world. He took a deep breath, sat down, and retrieved the filter cartridge. He guided the energy to envelop the bottles one by one. The light flowed, the cracks healed, and the bottle bodies became smooth and spotless. He rinsed them with water; the bottles reflected a warm, gentle light under the lamp, as if they had never been damaged.

The next day, the port was noisy and chaotic. Ad was busy at his stall, displaying the "repaired" medicine bottles in neat rows. Mbala—a young investigator sent by the Elders' Council—crouched before the stall. He picked up a bottle, turned it twice, and looked at it with suspicion. "This bottle looks new. Even the firing marks on the base are gone."

"Old stock, just washed clean." Ad kept his face impassive, and skillfully wiped at dust that didn't exist on the rim of the bottle.

Mbala set down the bottle and asked no more, but as he left he glanced back at Ad several times, his gaze clinging like hooks. By day's end the medicine bottles had sold out, traded for a crumpled wad of naira and a few bags of corn. Kenny stood apart from the crowd, face dark, knuckles white, staring hard at Ad's retreating back.

On the third day, the harbor well ran rusty and murky; children pinched their noses and fled crying. Ad carried the filter core over and crouched by the well, looking at the frightened faces, a tangle of feelings in his chest. Slowly he fed energy into the water, his movements gentle. A gray film rose to the surface and dispersed, and beneath it surged clear, living water. A woman watching cupped some in her hands, drank, and stood stunned for a long moment. Then her clouded eyes lit with surprise, and she cried out: "Sweet! This water is sweet!"

The news spread like drumbeats, striking at every heart. At dusk, Mbala and two men from the council of elders blocked Ad's path; with twilight deepening, their shadows stretched long. "The cooperative wants you to come."

"I've joined no cooperative." Ad stopped, his voice level.

Mbala stared at him, eyes sharp as blades. "That thing you use—it's no medicine, and no machine. The elders want to see it."

Ad stepped back half a pace, wary. "See what?"

"The stone in your hand that breathes." Mbala dropped his voice so only the three could hear. "Quit pretending. Zola brought word to the elders. She says it's the Covenant of the Ancestors—not something you can keep for yourself."

Ad tightened his grip on the filter core against his chest. His throat went dry; he swallowed. Mbala didn't press him. He sighed, turned, and signaled his men to fall back. "Tomorrow morning, before the elders' hall. Better you walk there yourself than be fetched."

That night, Ad was alone in the warehouse. The filter core sat on the table, its hum deeper than usual—like some kind of low speech. He drew energy to his fingertips and tried to probe inside the core. Something was lodged there, hard, blocking the flow. With tweezers he carefully pried away the rust—a chip the size of a fingernail came to light, its edge etched with a ring of patterns: the tribe's emblem, three rivers flowing into a single drum.

He held the chip, running his thumb over the carving. His heart pounded like a drum, falling into rhythm with the filter core's hum. Zola stood in the doorway, unannounced, her blind eyes tilted toward him as if she could see the truth of the dark. "You found it."

Ad turned, his hand trembling. "You know what this is?"

Zola extended a withered hand, the veins visible beneath the skin. Ad hesitated a moment, then placed the chip in her palm. She traced the carving, her lips moving, humming a low, hoarse song—a tune that seemed to come from a distant age, carrying the vastness of the savanna and the wet of the rainy season, making the heart clench. She stopped and returned the chip to Ad, her motion gentle, as if returning a sacred object. "The Covenant of the Ancestors. The filter is only the shell. The chip is the soul."

"What do you mean?"

"It has chosen you." Zola's voice was calm, yet weighted with an undeniable fate. "But the price of the covenant grows heavier each time. You used it to mend bottles, to purify water. Next time, it will ask for something else in return. Perhaps memory. Perhaps health. Perhaps—"

Ad clenched the chip; the metal edge bit into his palm, the pain sharpening his mind. "What?"

Zola didn't answer. She turned, leaning on her blind cane, walked to the door, and stopped, her silhouette stark in the moonlight. "Go to the elders tomorrow. They know which branch the emblem on that chip belongs to." Her voice dropped, fading into the wind. "That branch has been gone a long time."

The door closed. The warehouse held only the hum of the filter core and Ad's breathing. He looked down at the chip; the carving gleamed faintly in the light, like a silent eye watching his soul. Outside the window, the harbor lights were sparse. Far off, a drum sounded—once, then again—striking his chest, heavy and inescapable.

He put the chip into a pouch against his skin, together with the filter core, and tied it tight. The covenant's new price had not yet surfaced, but he knew it was waiting—like clouds before the rainy season, pressing down on the distant horizon, black and suffocating. He looked out at the dark ruins beyond the harbor: the old medicine factory, the broken walls, the place where he'd found the filter core—and the fate he could not flee. Tomorrow, he would go find the origin of that emblem, even if it meant stepping into the abyss.