Heroic Spirit Deck in Yu-Gi-Oh!

A sharp, mechanical clashing sound rang out as the Duel Disk absorbed the Field Spell Card. In that instant, the ground beneath Hoshino and the others began to transform.

"Feel the final will of Atlantis, Leviathan! In the name of the king, I activate the Field Spell—

First Seal: Atlantis of Miraculous Radiance!"

A brilliant world unfolded before their eyes—completely different from the shattered ruins of Atlantis they had seen within the Leviathan's body. The Field Spell activated by Hoshino restored the land to its full, resplendent glory.

"So this is Atlantis from ten thousand years ago? It's so beautiful... it's sparkling~"

Mana gazed in awe at the breathtaking scenery, so different from her native Egypt. Instead of endless yellow sands, the earth shimmered with radiant light.

"You did it, Hoshino-chan! This is perfect!" Da Vinci exclaimed in delight.

"According to the records of ancient conceptual civilizations, only a king with a pure heart can wield the Seal of Atlantis. That's why Holmes was so worried before... But I always believed in you, Hoshino-chan!"

Holmes adjusted his collar with a cough. "Ahem. I merely speculated that, given Miss Hoshino's earlier statement about wanting to marry grade-schooler Illya, she might not qualify as 'pure of heart.' At the very least, I assumed it would negatively affect her standing. But it seems the standards from ten thousand years ago were... quite different."

So by your logic, Holmes, were humans ten thousand years ago just a bunch of copper-headed degenerates?

"Watch out, the Leviathan is about to attack!"

There was no time to admire the reborn Atlantis. Yugi's sharp warning rang out as the giant serpent opened its maw once more, unleashing a beam capable of annihilating a capital city in an instant. This time, there was no Iskandar to intercept it—the scorching death ray surged forward, powerful enough to incinerate everything.

"Everyone, fall back!"

But to everyone's astonishment, Hoshino didn't summon a monster. Instead, she stepped forward alone, extending her right hand before her.

"—Activate now! Primeval Holy Barrier – Mirror Force!"

A massive barrier materialized out of thin air—far larger than any standard Duel hologram. Fully deployed, it clashed head-on with the annihilating beam. Light and heat collided, erupting into a blinding storm of gold and azure fragments that rained across the skies.

"Waaahhh! That was so cool, aibo!"

With a single move, Hoshino had blocked a death beam that could destroy the world. Hoshino Alter stared in awe, her eyes glittering with admiration.

"Primeval Holy Barrier? Hoshino, what's going on?"

Even Yugi was shaken. A mere Trap Card shouldn't be able to withstand the Leviathan's power—but the energy radiating from that barrier was undeniable.

Da Vinci quickly explained,

"The Atlantis once coexisted with Duel Spirits. The ultimate barrier, manifesting their civilization itself as power, allows its wielder to command Primeval Spirit Magic at will."

[First Seal: Atlantis of Miraculous Radiance – Field Effect: You can activate Spell and Trap effects directly from your Deck.]

"Exactly!" Hoshino declared, locking eyes with the monstrous serpent. "Brace yourself, Orichalcos! This is the will of Atlantis!"

Thunder roared. Lightning surged across the heavens, striking the Leviathan's celestial-scaled body.

"—Raigeki!"

"Raigeki," the Spell Card that destroys all enemy monsters without cost—a card so overwhelmingly powerful it had long been banned. Now, infused with Primeval Spirit Magic, its destructive force was beyond imagination.

"Hoshino, you're like a god!"

Mana watched with wide eyes, reverence replacing fear. Summoning storms, deploying divine shields—Hoshino now looked every bit the incarnation of a king.

"RROOOAARRR!!"

The Leviathan's furious roar confirmed it: Hoshino's lightning had hurt it. The beast that once seemed invincible was now bleeding divine energy.

Abandoning its beam attack, the serpent lunged savagely toward Hoshino.

"Heh... Even a Beast enhanced with double power is starting to panic now, huh?"

Hoshino flicked her fingers, and from the void burst countless black chains, clattering as they wrapped around the serpent's colossal form.

"You've wandered for ten thousand years... This grudge won't end so easily! —Binding Curse of Darkness!"

The chains groaned and cracked, the sound ringing like death knells as the beast thrashed violently.

"Even with Primeval Magic, we're barely restraining it…" Hoshino muttered as the serpent's strength began to fracture the bonds.

"To defeat a Beast... we need a greater force. Yugi! Prepare to summon the three Egyptian Gods!"

"Summon... the Egyptian Gods?" Yugi echoed in shock.

"That's right. It's time to change the field! By the name of the King—activate: Atlantis Barrier, Second Seal..."

Da Vinci's voice spiked in alarm.

"Wait—Second Seal? I've never seen any records of Atlantis having multiple Seals!"

The Orichalcos had three seals because it fractured and corrupted the original Atlantean Seal, diluting its power. But according to every known record, the true Seal of Atlantis was singular and unified. That's why the replica Da Vinci made only had one form.

"The First Seal was indeed a projection of Atlantis as it was ten thousand years ago... But the next—this is the Seal I created myself!"

Hoshino raised her Duel Disk high as the luminous earth beneath her began to shift again. Time advanced in visible waves, spanning ten millennia in a heartbeat.

"This is the Second Seal—Atlantis Legacy!"

Though Atlantis had fallen to Orichalcos long ago, its fate was now reborn in Hoshino's hands. As the last king standing beneath this sky, she would carry that legacy across ten thousand years.

"Stack the Seals—heed my call!"

Three pillars of dark radiance erupted from Hoshino's Deck, piercing the heavens. Empowered by the Second Seal, she shattered the very limits of soul energy and invoked an impossible summoning.

[Effect: You can Normal Summon/Set monsters without Tributing.]

"Wicked Eraser! Wicked Dreadroot! And the strongest—Wicked Avatar!"

"Girl, it's only been two days since I last saw you, and now you've become such an incredible person~"

Unlike the Eraser and Dreadroot, who immediately charged toward the Leviathan after being summoned, the Wicked Avatar lingered in her childlike form, even finding time to chat with Hoshino.

"So you're the King of Atlantis? Honestly, I've sensed that extraordinary power in your soul for quite some time."

Seeing Hoshino summon the three Wicked Gods and grasping the effect of the Atlantis Seal, Yugi did not remain idle. Breaking through the limits of his own soul energy, he summoned the three Egyptian God Cards.

"Go forth—Obelisk the Tormentor! Slifer the Sky Dragon! The Winged Dragon of Ra!"

From Yugi's Duel Disk erupted three dazzling lights—blue, red, and gold—manifesting the strongest Divine Beasts, the pinnacle of Duel Monsters.

Radiant like the sun, thunder, and tempest, their combined majesty clashed against the cold, ominous aura of the Wicked Gods—hellish beings incarnate. Together, they converged upon the Leviathan, still bound in chains.

Shading her eyes with a tiny hand, the Wicked Avatar looked up and laughed. "Now this is something else! This is what I'd call a war of the gods!"

Hoshino irritably flicked her on the head. "So that's why you've been slacking off? Get in there already!"

"Hehehe~ As the strongest one, of course I'll be the final act! But girl, don't be too shocked when you see me in full force!"

A smug smile curved across her cute face—just as a terrifying, malicious aura began radiating from her small body.

"With this infinite soul, I can unleash power beyond compare… Allow me to show you—my true form!"

"Evil God… -san?"

Hoshino's crimson eyes trembled slightly at the shift in tone.

The Wicked Avatar had always mimicked others in battle, never revealing her true self—because…

"Your real form… isn't it just a sphere?"

Just as suspicion crept into Hoshino's mind, Da Vinci's urgent voice rang from the observation deck.

"Hoshino-chan! I'm picking up a reaction from a new Beast! After the Leviathan and Zorc, a third Beast has appeared!"

Beasts always manifested in chains—when one emerged, others followed. But three Beasts at the same location, in such a short span? Even Da Vinci found that unprecedented.

"A third Beast… This has to be a joke…"

Hoshino Alter stared in disbelief, trembling as the Wicked Avatar unleashed her true power.

"Evil God-san… are you also one of those disasters rejected by human history… a Beast?"

"Girl, just because we've been together this long, did you really start thinking I'm a good person?"

Her power surged. The petite frame of the Wicked Avatar vanished within a storm of black malice, her body expanding at a terrifying rate.

"From the moment I was born, I was a Beast of pure evil—created to devour human souls!"

Her malice unbound, she transformed—her body swelling until it rivaled even Zorc in size.

In stark contrast to her previous childish form, her true appearance emerged: a towering, voluptuous woman draped in a revealing black cloak that clung to snow-white skin. Every detail of her figure radiated overwhelming, almost divine menace.

"So… you really are a Beast, Evil God-san…"

That massive, feminine form exuded an oppressive aura not a whit inferior to Zorc's. In Hoshino's mind, this was a form that could stand alongside Beasts like Tiamat or Sesshōin Kiara.

"When I was first created, I believed humans were nothing more than dull containers for souls. If you hadn't stopped me after I was revived by Yako's hand, I'd have probably ended up like this snake."

Crossing her arms in a commanding pose, the Beast let the wind whip her black cloak aside, revealing long, pale legs.

"But after meeting you, girl, I realized… maybe not all humans are boring. No—maybe I've actually come to like humanity, because of one person. So this time… let me fight for humanity, as the evil rejected by its history."

Raising what seemed like a delicate arm, she condensed pure malice into a swirling black spiral around her fair fist.

Hoshino Alter's voice rang out with excitement. "Evil God-san's true form is so cool!"

"Watch closely! With the power of Atlantis, this is my ultimate form! Based on your taste, girl, I'll call this move…

'Heaven and Earth – Humanity's History – Severing Correction Fist!!'"

Channeling every ounce of her Human Evil and Beast-class might, the Wicked Avatar's true form drove a devastating punch straight into the Leviathan's head.

The blow tore through its body from head to tail, shattering the stars embedded in its translucent scales.

"Spit it out—your breakfast, lunch, and dinner! All that power you swallowed—spit it up, Snake!"

"ROAAAAAR!!" For the first time, the serpent howled in agony. Not even Hoshino's thunderbolt nor the combined assault of the three Egyptian Gods had inflicted such pain. Despite absorbing Zorc's strength, a strike from another Beast-class being could wound it grievously.

CRACK—!!

Thrashing in pain, the Leviathan finally shattered the black chains restraining it, breaking free from Hoshino's original spirit magic.

"Oh? You still have that much strength after taking my full-force punch? I guess I shouldn't be surprised—you did absorb Zorc, after all."

One hand on her hip, the Wicked Avatar cockily pointed at the freed serpent.

"Well then, warm-up's over. Now comes the real fight—a full assault combining the strongest divine monsters in this world into a force that transcends all limits!"