[Alfheim Online — World Tree Interior]
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Generally speaking, Divine Artifacts existed in one of two states.
The first was dormancy—a slumbering relic waiting for hands worthy enough to claim it. These were the simplest retrievals. Find the artifact, pick it up, walk away. No theatrics, no cosmic bargaining. Just possession.
The second state was activation. The Infinite Corridor that Aoyama Nanami and Yusa Emi had once stumbled into fell under this category—a Divine Artifact whose abilities had already awakened, its trial protocols humming with ancient purpose. For artifacts like these, mere discovery meant nothing. One had to participate in the artifact's trial, navigate whatever labyrinth of challenges it presented, and only upon successful completion would the relic deactivate and submit to its new master.
The Alchemy Heart, according to Hozuki Nozomi's speculation, had been obtained by Kayaba Akihiko at some point during his creation of Sword Art Online. The golden seed he'd entrusted to Asuna before his death—that shimmering kernel of infinite possibility she'd carried in her avatar's inventory like a keepsake—was the Alchemy Heart's core.
It was the cornerstone of virtual reality itself. A seed containing the fundamental code of world-building, capable of manifesting whatever its wielder could imagine. In the right hands, it could birth paradises. In the wrong ones, hells.
Asuna had been the one to defeat Kayaba Akihiko. She had liberated all ten thousand players trapped in that death game, her rapier piercing through the creator's chest while the floating castle crumbled around them. By every metric, she should have inherited the Alchemy Heart's full potential. She should have walked out of that nightmare with the power to reshape reality itself.
But the Sugō Nobuyuki of her world had not been dealt with in advance.
Unlike in Nozomi's timeline, where certain interventions had neutralized threats before they could metastasize, Asuna's version of events had proceeded without interference. And so Sugō Nobuyuki—that simpering, white-haired cockroach in an expensive suit—had been allowed to survive. To scheme. To hunger.
He had initiated illegal brain experiments on three hundred comatose SAO survivors, mapping their neural pathways, developing technology to rewrite memories and implant false thoughts. His research papers, hidden behind seventeen layers of corporate encryption, bore titles like "Cognitive Restructuring Through Full-Dive Immersion" and "Practical Applications of Memory Substitution in Marketing Environments." He wanted to control minds. He wanted to sell that control to the highest bidder. He wanted, in his own pathetic way, to become a god.
But beneath the clinical ambition festered something far more personal.
Sugō Nobuyuki had been engaged to Asuna through their families' arrangement since before she'd ever logged into Sword Art Online. He had watched her unconscious body lie in that hospital bed for two years, visiting weekly, brushing hair from her sleeping face with fingers that lingered too long. He had convinced himself that she belonged to him. That her comatose form was merely a chrysalis, and when she finally woke, she would emerge as his perfect bride—grateful, compliant, adoring.
When she hadn't woken with the other survivors, he'd seen opportunity.
Why let her return to consciousness at all?
In the fairy magic world of Alfheim Online—a game built from the bones of Aincrad's server architecture—Sugō had constructed a gilded cage at the apex of the World Tree. He had transferred Asuna's consciousness there, trapped her in an avatar she couldn't log out of, and crowned himself Oberon, King of the Fairies.
Every day, he visited her prison.
The cage hung suspended in eternal twilight, its bars fashioned from code that burned when touched. Asuna's avatar—forced into the form of Titania, Queen of Fairies—wore diaphanous white silks that Sugō had designed himself. The fabric was deliberately thin. Deliberately clinging. She couldn't change it. Couldn't modify her appearance. Couldn't even close the cage's open front when he materialized inside.
"You're so beautiful like this," he would whisper, circling her like a collector admiring a pinned butterfly. "So much more honest than you ever were in the real world. No family name to hide behind. No social obligations. Just you and me, Asuna. Forever."
She had screamed at him until her virtual throat went raw.
She had attacked him with her bare hands, only to find her damage output reduced to zero against an administrator-flagged entity.
She had tried to kill herself—throwing her avatar against the cage bars, commanding self-destruction protocols, even attempting to corrupt her own save file—but Sugō had anticipated everything. Her HP couldn't drop below one. Her consciousness couldn't disconnect. She was immortal in the worst possible way.
And sometimes, when he grew bored of her resistance, he would use administrator commands to adjust her emotional parameters. Inject false sensations. Make her body respond in ways her mind rejected.
"See?" he'd purr, watching her shudder against her will. "You do want this. You just need permission to admit it."
Asuna had lost track of how many times she'd dissociated during those sessions, retreating into some deep corner of her psyche where his hands couldn't reach. The humiliation was a physical weight. A taste like copper and ash coating her tongue.
I want to change everything.
I want to escape.
I want him to suffer.
During one of Sugō's brain mapping experiments—a particularly invasive scan meant to chart her emotional response pathways—the Alchemy Heart's core had detected its host's desperation. The golden seed, dormant for so long, had performed an emergency self-preservation protocol.
It activated.
Reality had folded around Asuna like origami, and when the creases smoothed, she found herself standing in Hozuki Nozomi's world.
---
Ten years.
She had lived ten years in that parallel existence, building a new life from the wreckage of her old one. She had raised Yui—her Yui, the daughter she adopted—into a normal childhood. She had learned to smile without flinching. To sleep without nightmares. To believe, hesitantly, that safety wasn't a temporary illusion.
But the Alchemy Heart's energy reserves were finite.
When the power depleted, it dragged Asuna back to the exact moment the experiment had malfunctioned—her consciousness snapping into Titania's avatar like a rubber band stretched past its limit. The cage materialized around her. The World Tree's perpetual dusk pressed against her skin.
She was back.
Except now, the Alchemy Heart had unbound itself from her avatar. It recognized that Asuna's ten years of growth had fundamentally altered her soul's compatibility with its protocols. She was no longer the desperate prisoner it had rescued. She was something harder. Something with edges.
The Divine Artifact required a new master recognition trial.
「DING!」
The Game Life System notification chimed directly into Nozomi's consciousness:」
「To gain the recognition of the Divine Artifact [Alchemy Heart], please become the strongest person in the world.」
Nozomi's eyes narrowed.
Strongest person in the world?
That phrasing was deliberately ambiguous. Did it mean the strongest entity in Alfheim Online's current server instance? The strongest among all connected players? The strongest in some metaphysical sense tied to the Alchemy Heart's original parameters?
"Does it mean becoming the strongest person in this virtual reality game world?" he asked aloud, directing the question at the System.
「DING! Hint: The Elf King is the strongest in the world.」
Ah.
Understanding crystallized.
Simply put, he needed to remove Oberon from power through legitimate in-game means. No external hacking. No exploiting dimensional privileges. He had to climb the ladder the same way any player would—fighting, winning, ascending.
And this world had a mechanism for exactly that kind of ascension.
The Elf Sword Festival.
A tournament held once per server-year, open to all fairy races. Participants dueled through elimination brackets until only one remained. The champion earned the right to challenge the Elf King directly. If they won that final confrontation, the throne—and all its administrative privileges—transferred to the victor.
Sugō had designed the system himself, confident that his administrator cheats made him unbeatable. No player could ever genuinely threaten him. The Sword Festival was theater, a pressure valve to give the masses hope while ensuring his permanent reign.
He hadn't accounted for Yui.
He hadn't accounted for them.
"What's wrong, Nozomi?"
Asuna's voice pulled him from his calculations. She stood a few feet away, her Titania avatar's long chestnut hair catching the ambient light from the World Tree's interior. Her amber eyes—the same shade as her daughter's—searched his face with evident concern.
He went quiet after I finished explaining everything, she thought, fingers unconsciously gripping the fabric of her white silk dress. Did I overwhelm him? Is my situation too complicated? Does he regret getting involved?
"Oh, nothing." Nozomi shook his head, offering a reassuring smile. "I was just thinking about how to get you out of this world and back to Yui Yuigahama. I've found the right way now."
"What's the method?" Asuna stepped closer, hope bleeding into her voice despite her attempts at restraint.
Of course she didn't want to leave her daughter. Ten years of bedtime stories and scraped knees and first-day-of-school jitters—she couldn't abandon that. Wouldn't.
"It's simple." Nozomi gestured broadly, encompassing the twilight cage around them. "We'll both participate in the Elf Sword Festival as ordinary players. After defeating every other competitor, we'll challenge the Elf King Oberon directly."
"Once we defeat him," he continued, "we'll gain the right to make a wish. And then we can go wherever we want."
"This…" Asuna hesitated, brow furrowing. "Is it reliable?"
"Of course it's reliable!" Nozomi grinned, something sharp glinting behind his casual expression. "Asuna, don't you want to personally teach that scumbag who imprisoned you—who violated you—a painful lesson? Don't you want to see his face when he realizes he's not untouchable anymore?"
Heat flooded Asuna's chest. Her hands clenched at her sides.
Yes.
God, yes.
"Of course I do." The words came out rougher than she intended. "But my current identity in the game is Titania, the Elf Queen. I can't participate in the Elf Sword Festival—queens are barred from tournament entry. It's part of the system rules Sugō implemented to protect himself."
"That's simple." Nozomi turned toward the small figure hovering near the cage's upper bars. "Yui, I'll leave it to you."
"No problem, Daddy!"
The long-haired black fairy descended in a flutter of iridescent wings, her childish face beaming with mischief. Yui's avatar in Alfheim Online resembled her Aincrad form—petite, dark-haired, eternally appearing around eight years old—but her wings marked her as a Navigation Pixie rather than a standard player.
Mom's going to be so impressed, Yui thought, suppressing a giggle.
She extended one delicate hand toward Asuna.
Golden light spiraled from her fingertips, weaving into Asuna's avatar like threads merging with fabric. The code restructured itself—partition walls erected, permission hierarchies duplicated, a parallel identity scaffolded beneath the Titania framework.
"Mommy, it's done." Yui withdrew her hand, wings beating a satisfied rhythm. "Try it."
Asuna blinked.
A new status window materialized in her peripheral vision, its interface distinctly different from the ornate Elf Queen displays she'd grown accustomed to. Where Titania's menus featured royal crests and gilded borders, this interface was clean, utilitarian, anonymous.
Player Name: Asuna
Race: Undine
Level: 1
Status: Registered for Elf Sword Festival (Pending)
A sub-account. Yui had created an entirely separate player identity nested within Asuna's consciousness, invisible to Oberon's administrative oversight.
Who doesn't know how to cheat?
"It really works!" Asuna's voice cracked with disbelief. She spun toward Yui, arms already opening. "Yui, you're amazing!"
She swept the tiny fairy into a crushing embrace, rubbing her cheek against Yui's hair, inhaling the faint scent of virtual honeysuckle that clung to the Navigation Pixie's avatar. Her daughter. Her impossible, miraculous, code-born daughter.
"Hehe, Mommy." Yui nuzzled into the embrace, her voice muffled against Asuna's collarbone. "Do you approve of Yui now?"
"Yes." Asuna pressed a kiss to the crown of her head. "Because your name is Yui too, which means we have a strong connection. We were always meant to find each other."
She glanced sideways at Nozomi as she spoke.
Yui called her Mommy.
Yui called him Daddy.
So she and Nozomi… looked like a couple…
What am I thinking? Asuna's cheeks flushed pink beneath Titania's flawless virtual complexion. He's helping me. That's all. He's Yui's father in this world, and I'm her mother, and we're cooperating to save our daughter. There's nothing romantic about—
But he does have nice shoulders.
And he didn't flinch when I described what Sugō did to me.
And he's looking at me like I'm a person, not a prize.
She buried her face in Yui's hair before he could notice her blush.
Nozomi, oblivious to the emotional turbulence occurring three feet away, clapped his hands together.
"Then let's go! Before participating in the Sword Festival and challenging other players, we need to get familiar with this world's combat methods." His gaze fixed on Asuna's sub-account status window. "You were the second-in-command of the Knights of the Blood Oath. The Lightning Flash herself. Show me your skills haven't rusted."
"Asuna, can you show me your 'Flash' technique?"
"No problem!" Determination replaced her earlier embarrassment. "Just watch!"
Under Yui's guidance, the three of them teleported to a monster spawn zone in the wilderness beyond the World Tree—a twilight forest where shadow wolves and corrupted treants roamed in predictable patrol patterns.
Nozomi observed the environment with analytical detachment.
The controls here mirrored Aincrad's fundamentals: thought-based sword skill activation, momentum-dependent damage calculation, cooldown windows between special attacks. But Alfheim added layers of complexity. Flight mechanics transformed every engagement into three-dimensional chess. Racial magic systems—Undine healing, Salamander pyromancy, Sylph illusions—introduced variables that pure swordplay couldn't address.
And underlying everything, Sugō's administrator privileges lurked like a tumor in the system architecture.
But Yui can carve out spaces where those privileges don't apply, Nozomi reminded himself. We just need to reach him.
Asuna drew her rapier—a slender blade of blue-white steel that materialized from her inventory with a soft chime—and launched herself at the nearest shadow wolf.
Her wings spread wide, catching updrafts , accelerating her to speeds that blurred the boundary between movement and teleportation.
「Linear!」
The single-thrust sword skill connected with the wolf's skull before the creature could react. Damage numbers erupted in crimson: 4,892.
「Parallel Sting!」
Two consecutive strikes pierced the wolf's flank, each hit staggering it further, preventing any counterattack window.
「Star Splash!」
Asuna's rapier became a constellation of afterimages—eight thrusts delivered so rapidly they appeared simultaneous. The shadow wolf dissolved into polygonal fragments, its death cry lost beneath the chime of experience points distributing.
She landed lightly on the forest floor, breath steady, rapier already returning to ready position.
「Mother's Rosario!」
Her strongest technique—eleven hits in under two seconds, each strike building on the last's momentum, the final thrust carrying enough force to crack castle walls. She demonstrated it against a corrupted treant, reducing the towering creature to splinters before its health bar could even update.
Nozomi watched her move, memorizing the rhythm of her attacks, cataloging her openings and recovery frames.
She's better than I expected.
If she had magic power, she could transform into something divine.
And that worthless Oberon doesn't know a single genuine sword skill.
Sugō Nobuyuki's combat ability, stripped of administrator privileges, amounted to nothing. He was weaker than first-day players, his reflexes atrophied, his instincts nonexistent. He had never needed to learn fighting because he'd always been able to cheat.