The morning of their departure dawned cold and grey, a thick mist clinging to the cobblestones of Grisel like a shroud. Shotaro stood by the loaded-down cart they'd rented, checking the straps on their packs for the third time. The mundane task was a welcome anchor. The strange mark on his stomach had been quiet all night, a dormant, faint warmth, but the memory of its discovery was a cold stone in his gut.
Etsuo emerged from the bakery, her arms laden with fresh, wax-paper-wrapped loaves. Her movements were efficient, practiced, but her eyes scanned the misty street with a wariness that was new. "The baker says the mountain pass is clear, but the frost-wolves have been bold this season. We'll need to keep watch."
"I've got perimeter wards," Fumiko said, tapping her staff. A tiny, intricate rune of ice-blue light flickered at its tip before fading. "Basic ones. They'll chime if anything bigger than a hare crosses within fifty paces."
"And I've got this," Rin added, patting the head of her axe where it was strapped to the cart. The infused magic stone from Kadyr's work gave the metal a faint, almost imperceptible violet sheen in the low light. She caught Shotaro looking at it and her smile tightened. "Don't worry. It's just a tool."
Just a tool with a price, Shotaro thought, but he kept it to himself. The pact of honesty was fragile. He could see the same thought reflected in his mother's tense shoulders.
The journey north out of Grisel was a slow ascent out of the river valley. The cheerful, if rough, frontier town gave way to dense pine forests, the road narrowing to a muddy track. The cart creaked and jolted over roots and stones. The mist burned away by mid-morning, revealing a sky the color of tarnished silver. The air grew thinner, sharper, carrying the scent of pine sap and cold stone.
They traveled in a silence that was less comfortable than tense. Every rustle in the underbrush made Fumiko jump and murmur a strengthening word to her ward. Every distant bird cry had Rin's hand drifting to her axe. Etsuo drove the cart, her gaze fixed ahead, but Shotaro could see her knuckles were white on the reins.
He walked beside the cart, his short sword a useless weight at his hip. His mind churned. The Corrosion Curse. Fumiko's whispered name for it felt too accurate, too final. Was it on all of them? Was the "Skill XXX" just its first symptom? His mother and sisters had gained power through… acts. What would his curse demand? The thought made the mark on his skin prickle unpleasantly.
"So this tomb," he said, breaking the silence. His voice sounded too loud in the quiet forest. "What did they say was inside? Besides murals."
Rin shrugged, her ponytail swaying. "Derrick said it was a 'saint's rest.' Fynn called it a 'loot pinata for idiots.' They never went deep. Said the lower levels were sealed by magic that 'didn't feel right.' They're cowards when it comes to real magic."
"Or smart," Fumiko countered, adjusting her glasses. "If the magic 'doesn't feel right,' it could be cursed. Or trapped. We should be cautious."
"We are cautious," Etsuo said, her voice calm but firm. "But caution won't give us answers. We need to see these murals. If they truly show people falling from the sky… it could be a record of others like us. Others who were brought here."
"And maybe what happened to them," Shotaro added, the grim possibility hanging in the air.
They made camp that evening in a small clearing off the road, a spot where the trees thinned enough to reveal the first jagged, snow-capped peaks of the Frostblooms clawing at the sky. The temperature plummeted as the sun dipped below the tree line. Fumiko used her new water magic to summon a small, steady stream for the horses and to fill their canteens, her control noticeably finer than it had been a week ago. Rin gathered firewood with brutal efficiency, splitting thick logs with a few clean axe strokes. Etsuo prepared a simple stew from dried meat and vegetables, her movements automatic.
Shotaro tried to help, but felt clumsy, superfluous. He eventually settled for sharpening his short sword, the repetitive shink-shink of the whetstone filling the quiet. The fire crackled to life, pushing back the creeping dark and the cold.
As they ate, huddled around the flames, the pact of honesty felt like a physical presence at the circle.
"The mark," Etsuo began, her eyes on the stew in her bowl. "Has it… changed?"
Shotaro shook his head. "Same. Warm. Doesn't itch unless I think about it." He took a breath. "What about… the Skill? For you three. Does it feel like it's… waiting?"
Rin poked the fire with a stick, sending up a shower of sparks. "It's not a feeling. It's like… a blank space in my head. An empty room. But I know something's supposed to be in there. And sometimes…" She trailed off, frowning.
"Sometimes," Fumiko finished quietly, "I get a… a whisper. Not words. A pull. When we passed that trapper's cabin this afternoon, the one with the smoke coming from the chimney… I had a sudden, clear thought that I should go ask for directions. Even though we have a map."
"A pull towards a person?" Shotaro asked, his skin crawling.
"Towards an opportunity," Etsuo corrected, her voice heavy. "For me, with Kadyr, it was the minerals. I knew they were powerful. I needed to have them used for Rin. The thought was so strong it drowned out everything else. Until the… the other thoughts took over." She wouldn't meet their eyes. "The voice, the 'task finished'… it comes after. It's a receipt."
"So it dangles a reward," Rin said, her tone analytical, trying to strip the horror from it. "It shows you something you want—better gear, a new spell, a crafting skill—and then it… facilitates a situation where you can get it. For a price."
"A price it chooses," Shotaro said. The pieces were fitting together into a monstrous picture. "And it's starting with me. But I don't have a reward dangling. Just this… this mark." He looked at his mother. "What was the first sign for you? Before the blacksmith?"
Etsuo was silent for a long time, the firelight dancing on her face. "Awareness," she said finally. "A heightened awareness of… of men. Their looks. Their strength. The way Kadyr held his hammer. It wasn't attraction. It was… appraisal. Like he was a resource. The Skill made me see people as tools for my family's advancement." She wrapped her arms around herself. "I fought it. I told myself I was just being a good mother, getting the best for my daughter. The curse makes the justification feel real."
The confession sat amongst them, ugly and raw. Shotaro thought of his own frustration, his jealousy, his desperate need to be strong, to be seen as more than a tag-along. Was that his fertile ground? Was his curse waiting to twist that hunger into something worse?
"We can't let it divide us," Fumiko said, her voice firm despite the fear in her eyes. "We have to be each other's… anchors. If one of us feels that 'pull,' we tell the others immediately. We walk away."
"And if we can't?" Rin asked, the question stark in the firelight.
No one had an answer.
The next day's travel was harder, the track steeper, the air bitingly cold. The forest began to change, the pines becoming gnarled and stunted, their branches heavy with old snow. By afternoon, they reached the foot of the mountains proper. The road ended at a wide, rocky ledge overlooking a mist-filled valley. Carved into the cliff face beside them was an entrance.
It was not grand. It was a simple, arched doorway of fitted stone, weathered by centuries of wind and ice. No ornate carvings, no guardian statues. Just a dark opening, about ten feet high and wide, with remnants of rusted iron hinges where gates had once been. A sense of profound age and stillness emanated from it, swallowing the sound of the wind.
"The Saint's Rest," Rin murmured, hefting her axe. "Cheery place."
Fumiko extended her staff, murmuring an incantation. A soft, white light bloomed from the crystal at its tip, illuminating the first few yards of the interior: a smooth, downward-sloping corridor of the same grey stone. "No immediate magical signatures. The silence is… absolute. My wards don't want to penetrate it."
Etsuo lit a lantern, its flame a warm, living contrast to Fumiko's cold magical light. "Stay close. Rin, point. Fumiko, rear guard. Shotaro, with me." Her orders were calm, but her grip on her sword's hilt was tight.
They entered.
The silence was indeed a physical thing, a thick blanket that muffled their footsteps and their breathing. The air was dry and carried a faint, dusty smell of old stone and something else—a metallic tang, like cold iron. The corridor descended steadily, the walls perfectly smooth, showing no tool marks. It felt less built and more grown, or perhaps melted from the mountain itself.
After about a hundred yards, the corridor opened into a circular chamber. Their lights revealed walls covered in intricate, faded mosaics. The style was archaic, the tiles small and finely set, depicting scenes of pastoral life: farming, weaving, worship in simple groves. The figures had a serene, stylized beauty.
"The saint's life," Fumiko whispered, her voice absorbed by the stillness. She moved her light along the walls. "Look. Here he is… healing the sick. Blessing crops."
"Not much of a 'loot pinata' so far," Rin commented, her eyes scanning the shadows at the chamber's edges. Three other corridors led away from the room, dark and identical.
"Derrick said the 'good stuff' was deeper," Shotaro said, the mark on his stomach giving a faint, curious pulse. It wasn't warmth this time, but a subtle tug, like a compass needle twitching. He ignored it. "Which way?"
The tug came again, slightly stronger, pulling his attention towards the left-hand corridor. He clenched his teeth. No. I choose.
"We check them all, methodically," Etsuo decided. "This chamber is central. We start with the right."
They spent the next hour exploring. The right corridor led to a series of small, empty cells—perhaps meditation chambers or tombs long since looted. The center corridor ended in a collapsed ceiling, a tumble of rock and dirt blocking any further progress.
The left corridor, the one that had drawn Shotaro's mark, remained.
As they stood back in the central chamber, a low, sub-audible hum began to vibrate through the stone floor. Fumiko's staff-light flickered. "Magical field. It's intensifying. Coming from… that way." She pointed to the left-hand passage.
The tug at Shotaro's navel became an insistent, magnetic draw. He took a step towards the corridor before he even realized it.
"Shotaro?" Etsuo's hand caught his arm.
"It's… the mark," he admitted, shame heating his face. "It wants to go that way."
A look of profound sorrow crossed his mother's features, but it was quickly replaced by resolve. "Then that's where we need to go. But we go together. And you tell us the moment it changes."
The left-hand corridor was different. The smooth walls gave way to rougher, natural rock, as if they were entering a cave system that had been annexed by the tomb. The humming grew louder, a deep, resonant frequency that made their teeth ache. The air grew colder, the metallic smell stronger.
The corridor ended abruptly at a sheer wall of black, polished stone. It was seamless, without a crack or joint, reflecting their distorted images back at them. Set into the center of the wall was a single, intricate device: a disc of bronze, about two feet across, covered in concentric rings of strange, angular runes that glowed with a faint, sullen orange light.
"A seal," Fumiko breathed, approaching it cautiously. She held her staff-light close. "This is incredibly complex. The magic… it's old. And it's not just a lock. It's a test. Or a filter."
"A filter for what?" Rin asked, her axe at the ready.
"For specific kinds of magic. Or… perhaps for specific kinds of people." Fumiko traced a finger in the air an inch from the disc. "These runes… I've seen fragments of this script in the guild's restricted lore. It's pre-Collapse. It deals with transference. With souls being moved between… vessels. Or worlds."
Shotaro's mark was throbbing now, a steady, hot pulse in time with the orange glow of the runes. The pull was undeniable. He felt a bizarre sense of recognition, as if the seal was a lock and the warmth in his stomach was a key, itching to be used.
"It wants me to touch it," he said, his voice strained.
"No," Etsuo said immediately, stepping between him and the seal.
"But what if it's the only way in?" Rin argued. "What if the answers are behind this thing? Fynn said the murals were in a sealed chamber. This has to be it."
"We don't know what it will do to him!"
"We don't know what not doing it will do either!" Shotaro snapped, the frustration and the incessant pull overwhelming his fear. "It's getting hotter. It's not going to stop. This is my part in this, don't you see? You all got your 'tasks.' This is mine." He looked at the seal, at the ancient, glowing runes. "It's a filter. Maybe it filters for people who are… cursed."
Before anyone could stop him, he darted past his mother and placed his palm flat against the cold bronze disc.
The effect was instantaneous.
The orange runes blazed with searing light. The deep hum rose to a deafening, metallic shriek. Heat, not from the disc but from his own mark, erupted across Shotaro's abdomen, so intense he thought his skin would blister. A torrent of images, sensations, and sounds that were not his own flooded his mind.
A blinding white light, not from a monitor, but from a rift in a star-filled sky.
The sensation of falling, not through air, but through layers of reality, his mother's scream and his sisters' shouts tangled with his own.
A woman's voice, melodic and immense, echoing: "A family's bond, a vessel's strength… a counterweight for the Corrosion…"
Then a different voice, sly and whispering, weaving through the first: "…strength demands sacrifice… power flows through the weak points… the cracks in the soul…"
He saw, in dizzying flashes, the goddess who brought them here—a being of light and sorrow. And he saw another, a shadowy silhouette clinging to her like a parasite, injecting a strand of darkness into her spell.
The visions shifted. He wasn't seeing the past anymore. He was seeing possibilities. Glimpses of futures that made his blood run cold.
Rin, her axe discarded, kneeling before a figure clad in shadow, her defiant smirk replaced by vacant devotion.
Fumiko, her glasses broken, using her magic not to protect, but to ensnare, her face alight with a cruel, intellectual curiosity.
His mother, Etsuo, her wings of light now tattered and dark, leading a procession of faceless followers into an abyss, a single tear cutting through the dirt on her cheek.
And himself. Shotaro. In every glimpse, he was on the sidelines. Watching. A spectator. The mark on his stomach in these visions was no longer a faint stain, but a glowing, purple-black network of lines that covered his torso, pulsing with stolen power as he witnessed the ruin of his family. In one, he was smiling.
The shriek of the seal reached a crescendo and then cut off abruptly. The orange light died. The bronze disc was now dull, inert.
With a deep, grinding groan that shook the very mountain, the seamless black wall split down the middle. The two halves slid apart without a sound, revealing a chamber beyond.
Shotaro collapsed to his knees, gasping, his palm burning. The visions receded, leaving behind a psychic aftershock that made the world tilt. His mother and sisters were at his side in an instant, their voices a worried buzz.
"What did you see? Shotaro, speak to me!"
He looked up, his eyes struggling to focus. The chamber before them was vast, domed, and illuminated by a sourceless, pale blue light. And the walls… the walls were covered in murals, but not of a saint's life.
These were panoramic, terrifying, and breathtakingly detailed. They showed a cosmos of swirling worlds, and rifts tearing open between them. They showed people—people in modern clothing, people in armor, people from countless eras—tumbling through these rifts into the world of RuneSky. The central mural, directly opposite the entrance, depicted a radiant, androgynous figure of light, one hand extended in welcome. But coiled around that figure, almost indistinguishable from the shadows of the art, was a serpentine form of darkness, its mirthless grin etched into the stone, its tail-tip piercing the heart of the glowing figure.
Beneath this central image was a dais. And on that dais lay not treasure, but a single, large, leather-bound book, its cover embossed with the same angular runes as the seal.
Shotaro, still trembling, pointed a shaky finger past his family, past the awe-inspiring and horrifying art, to the book.
"It's a journal," he rasped, the words forced out through a raw throat. "The journal of the first one who was brought here. The first one who was… cursed." The heat in his mark subsided to a dull, ominous ache. The key had turned. The door was open. And whatever was inside had been waiting for them.