I completed the quest the system gave me to practice my body.
Rainhart stood at the edge of the family training yard, chest heaving, sweat soaking through his simple linen tunic. At six years old, he was no longer the toddling toddler who could hide behind innocent babbles and clumsy steps. His body had grown—lean, wiry, with the first hints of the Arcboard resilience already showing in the way his small frame endured punishment that would leave other children crying. The morning sun beat down mercilessly, turning the air thick and heavy, but he welcomed it.
The system quest had appeared three weeks ago, glowing green in his mind the moment he turned six:
[Quest: Foundation of the Storm – Body Tempering I]
Objective: Perform 100 daily body conditioning cycles (running, core exercises, breath control drills) for 21 consecutive days without detection.
Reward: +2 to all Physical Stats | Eyes of Nature Lv.1 → Lv.2 (Unlocks basic mana vein mapping) | 50 System Points
Hidden Condition: Maintain perfect "normal child" facade during training.
He had just finished the final set. One hundred cycles. Twenty-one days unbroken. The interface chimed softly in his head, invisible to the world.
[Quest Complete!]
Rewards distributed.
Physical Strength: 4 → 6
Agility: 5 → 7
Endurance: 6 → 9
Vitality: 7 → 9
Eyes of Nature (Lv.1 → Lv.2)
Mana Vein Mapping unlocked – You can now perceive and trace the flow of mana through living bodies and objects with greater precision.
System Points: 50
A quiet thrill ran through him. No outward celebration—just a small, satisfied exhale as he wiped sweat from his brow with the back of his hand. From his past life memories, the ones that still lingered like faded scrolls in the back of his mind, he knew one truth above all: stamina was everything. As a kendo practitioner in that distant world, he had learned the hard way that technique without endurance was useless. A single moment of exhaustion could turn a perfect strike into defeat. Here, in this world of mana, swords, and bloodline powers, that lesson burned even brighter. Without a strong foundation, even his divine core and unique skills would crumble under pressure when the seal finally lifted.
He had trained in secret every dawn—before the household stirred. Running laps around the estate's outer wall, hidden by the treeline. Core drills behind the woodpile: planks, leg raises, breath holds that pushed his suppressed mana to circulate just enough to temper his muscles without triggering Mother's watchful seal. Push-ups on uneven ground. Shadow footwork drawn from half-remembered kendo stances, adapted to his small body. All while keeping his face the picture of a carefree six-year-old whenever anyone glanced his way.
"Rainhart!" Mother's voice cut through the morning air, warm but carrying that familiar note of gentle command. Luna Arcboard stood at the edge of the yard, silver hair tied back loosely, her ruby eyes scanning the space with the sharp perception only an 8th Circle archmage possessed. "There you are. Come inside, my sweet. Breakfast is ready, and you look like you've been rolling in the dirt again."
Rainhart straightened quickly, forcing his breathing to even out. He plastered on his best boyish grin—bright, slightly sheepish—and trotted over, kicking up a little dust for effect. "Mama! I was just… playing tag with imaginary friends. They run fast!"
Luna laughed softly, crouching down to brush a stray leaf from his hair. Her touch was warm, laced with the faint tingle of healing mana that always seemed to soothe aches he tried to hide. "Imaginary friends again? You've been so energetic lately. Your father thinks you might take after him with all this running around." She paused, her gaze lingering a moment longer than usual, as if sensing something beneath the surface. The seal on his divine mana still held, but Rainhart knew the strain was growing—0.4% output had crept up to nearly 0.7% from his careful, hidden efforts.
He leaned into her hug, using the moment to activate Eyes of Nature (Lv.2) in the briefest pulse. The world sharpened. Mother's abyssal aura swirled like a contained storm—crimson-black lightning threaded with silver spatial veins. Her status flickered into view, updated from years ago:
[Luna Arcboard (née Inversia) – Full Status]
Age: 30
Mana Affinity: Extreme (Abyss Primary; Spatial, Healing Secondary)
Magic Circle: 8th Circle (Still restricted by Mother's Oath)
Physical Strength: 46
Agility: 61
Endurance: 56
Vitality: 72
Intelligence: 96
Wisdom: 89
Perception: 84
Unique Traits:
Abyss Sovereign's Grace … (unchanged)
Mother's Oath (Strain increasing; Seal on Rainhart's core now at 92% integrity)
Bloodline Transmitter: Inversia Abyss (Rainhart's latency showing early signs of spatial curiosity)
Potential: SS (Voluntarily capped)
The new mana vein mapping from the leveled skill revealed something fascinating: thin threads of his own suppressed divine mana were beginning to weave naturally into his muscles and meridians, reinforcing them like invisible smithing runes. No wonder the stamina training felt less punishing each day.
"Come on," Mother said, taking his hand. "Amura's already complaining that the twins stole all the honey bread. And your father wants to show you some basic footwork after breakfast—nothing serious, just play."
Rainhart nodded eagerly, letting his small hand swing in hers as they walked toward the house. Inside, the familiar chaos greeted him: Amura (now 13 and already taller than Mother) arguing good-naturedly with the twins, who were now 11 and blooming into their bloodlines. Lina's healing affinity made her the family's little medic, while Luna's spirit weaves turned household chores into playful light shows. Father Dane sat at the head of the table, sharpening a practice blade with steady, precise strokes—his draconic shadow affinity making the metal seem to drink in the morning light.
"Little brother!" Amura called, waving a piece of bread. "You look like you ran a marathon. What were you doing out there?"
"Exploring!" Rainhart replied, voice pitched with perfect childish enthusiasm. He climbed into his seat and reached for the porridge, deliberately spilling a little to sell the act. Under the table, his legs still burned pleasantly from the training. The new Endurance stat of 9 made the fatigue manageable—far better than the 6 he'd started with.
As breakfast unfolded with laughter and stories, Rainhart's mind wandered to the next steps. The system points sat unused in his interface. He could save them for a future skill upgrade or a hidden shop function that had teased itself into view last month. But for now, the real prize was the foundation he was building. Stamina wasn't flashy like Mother's abyssal lightning or Father's dragon-reinforced strikes. It was quiet. Invisible. The kind of power that let a swordsman—or whatever he would become—outlast empires.
Later that morning, when Father took him to the yard for "play" footwork, Rainhart followed the instructions with wide-eyed innocence while internally mapping every correction against his past-life kendo knowledge. Dane's Ancient Dragon's Blessing hummed faintly in his aura, shadows flickering at the edges of his movements.
"You've got good balance already, son," Father said, adjusting Rainhart's stance with large, calloused hands. "Keep your core tight. Breath steady. That's the secret—no matter how strong or fast you are, if your stamina fails, the fight is already lost."
Rainhart looked up with shining eyes, hiding the deep recognition blooming in his chest. "Yes, Papa. Stamina is most important."
Dane chuckled, ruffling his hair. "Smart boy. Where did you hear that?"
"From stories," Rainhart lied smoothly, then added with a grin, "And from watching you."
The rest of the day passed in the comfortable blur of childhood—lessons in letters and basic mana theory with Mother, sword drills observed from the sidelines, secret moments stealing glances at the family's statuses with his upgraded Eyes of Nature. The twins' potentials had grown; Amura's sword talent was sharpening into something formidable.
By evening, as the family gathered for dinner and the sun painted the sky in hues of crimson and gold, Rainhart slipped away for one final quiet check.
[Rainhart Arcboard – Status]
Age: 6 years, 1 month
Level: 1 (System Fully Activated)
Mana Core: Divine-rank (Heavily Suppressed – 0.7% Output)
Physical Strength: 6
Agility: 7
Endurance: 9
Vitality: 9
Intelligence: 24 (slow natural growth + system influence)
Wisdom: 20
Perception: 17
Luck: ??? (Hidden)
Unique Skills:
→ Eyes of Nature (Lv.2) – Mana vein mapping active
→ Life and Death (Lv.1 – Dormant; Activation progress: 21%)
He closed the interface with a small, secret smile.
The storm was no longer just brewing. It was tempering itself, layer by layer, breath by breath.
Normal on the outside.
Inside, the foundations of a future legend were being forged—one hidden lap, one controlled breath, one completed quest at a time.
And when the day came to unleash it all, stamina would be the blade that never broke.