The battlefield was unrecognizable.
Once a lush oceanic trench filled with coral gardens and glowing flora, it was now a cratered abyss of shattered stone, drifting detritus, and swirling blood. A haunting stillness had settled after the last clash—a deceptive calm before the storm's return.
From opposite ends of the ruin, two titans rose from the wreckage.
Kurai's breaths were shallow, her body trembling, black veins pulsing along her arms. The Shadow Sovereign rested at her side, its blade cracked in places from the last clash, yet pulsing with renewed hatred and hunger.
Across from her, Ursula's body was bloated and monstrous. Her once-seductive face had contorted into something grotesque—corrupted by the parasitic force that had infected her. Her arms swelled unnaturally, her tail longer and coiled with barbs. The trident in her grip thrummed like a storm contained in a cage.
"Still standing…" Ursula rasped, voice echoing as if layered with others. "You should stay beneath me, little shadow."
Kurai didn't smile. She was too tired for arrogance.
Instead, she raised her Keyblade and pointed it forward.
"I've already been beaten once by someone like you. Someone who believes themselves better than me. This time, I'm the one dragging someone into the dark. I will win."
Ursula's eye twitched. And then—shockingly—she laughed.
"A shame," she said, her voice curling into a mockery of sweetness. "You and I are not so different. Power. Rejection. Ambition. You should have ruled beneath me. With that blade and my trident, we could reshape all the realms."
Kurai tilted her head, voice cold. "It's not really ruling if I have to serve you. I came here to end you. But if you beg…" She moved forward, shadows rippling with every movement. "I might kill you painlessly."
Ursula's face twisted into something wicked and evil.
"So be it."
Ursula surged forward first, sweeping the trident in a wide arc. The ocean itself responded—columns of water crashing down from every direction. The pressure alone was enough to crush steel.
Kurai vanished—reappearing high above in a pillar of spiraling shadow. She dove, blade first, and clashed with the trident mid-air, sending a concussive wave through the sea.
The battle resumed like a song composed by fury.
Kurai struck with shadow-laced slashes, blades of void firing in spirals. Ursula countered with powerful water constructs—serpents, spears, claws—all bursting from the trident's tip like spells cast by an angry god.
The water churned into a sphere around them, trapping their duel in a suspended ocean chamber.
Ursula extended her arm and the trident formed a thousand spears of light from seawater, all aimed at Kurai.
Kurai raised the Shadow Sovereign.
"Come then."
Darkness exploded from the blade, forming a wall of teeth-like spires that moved, twisted, and snarled. The spears shattered against them, some slipping through—one grazing Kurai's cheek, another puncturing her shoulder.
She ignored them.
She pointed her blade—and the battlefield obeyed.
Dozens of chains erupted from the shadows, writhing and snapping. They struck from all directions, some wrapping around Ursula's limbs and neck, others dragging down her summoned sea beasts.
"You think this world belongs to you!" Kurai shouted, her voice distorted by the chaos. "But you're just another usurper like the rest of us! Don't think yourself important little insect!"
Ursula screamed, breaking one of the chains with a burst of magic. The trident unleashed another pulse—and a massive wave exploded outward, tearing through Kurai's darkness and flinging her into a boulder of coral and bone.
Kurai coughed, blood seeping from her lips. Her arm trembled under the weight of her Keyblade. The Shadow Sovereign hissed in protest but remained firm in her grip.
"You're weakening," Ursula sneered, blood and seawater dripping from her lips.
Kurai looked up, her bangs plastered to her face, eyes burning with shadows.
"So are you."
A sudden roar burst from Ursula's throat. The parasite inside her pulsed with desperation. Her form began to shift again—larger, more grotesque. Her arms split into writhing appendages, the trident growing larger in tandem with her size.
She became leviathan-like, filling the trench with her sheer mass.
"You're nothing!" she bellowed. "I AM THE SEA!"
She slammed the trident into the earth—triggering a seaquake. The ocean floor split. Pressure tore through the water, gravity bent around her.
Kurai dug her blade into the ground to resist being swept away. All around them, water warped with light and raw magic. It was like standing in a supernova beneath the sea.
And then—sudden silence.
Kurai raised her head, only to see a beam of condensed water and energy descending upon her.
She raised the Keyblade with both hands and took the hit head-on.
Her scream echoed through the realm.
Her body was flung hundreds of meters into the wreckage of a nearby ancient ruin.
From above, Helios watched, floating on the edge of the abyss. His body still shivered from the magic in the air.
He saw Kurai's fall.
He saw Ursula raise the trident—ready to pierce the final blow.
His Keyblade pulsed at his side.
"…Damn it."
As the trident came down on her Kurai raised the Shadow Sovereign one final time, shadow chains still binding Ursula in place. The Sea Witch writhed, her monstrous form cracking with every pulse of Kurai's surging darkness.
Kurai battered and almost dead, moved with a swiftness as she charged Ursula. Soon the tip of Kurai's blade hovered inches from Ursula's heart.
"You've lost," Kurai whispered, darkness coiling around her like a coronation veil. "I'll make it quick."
But just as the blade descended—
Clang!
It was stopped.
Blocked—by a flash of silver.
Kurai's eyes widened as a radiant spear intercepted her strike. Helios' keyblade Equilibrium, transformed into its light-forged spear form, Bríon na Lú, gleamed between them.
Helios had chosen now to show himself.
He stood just beside her, skin pale and glistening with blood and seawater. The currents swirled violently around him as he raised the spear once more—his voice low and unshakable.
"She's not yours to kill. I said we'd capture her."
Then—without hesitation—he turned the spear and drove it forward.
The point of Bríon na Lú pierced Ursula's bloated forehead. Light erupted in a pulse so blinding it turned the entire trench white.
Kurai shielded her eyes. Even she, a true darkness, flinched from the raw brilliance of it.
Ursula screamed—not a cry of rage, but of something deeper. The parasite inside her howled as the radiant energy cascaded through her corrupted form.
Her monstrous limbs cracked, shrank, and then—began to vanish.
The light stripped away everything that wasn't truly her.
The battlefield went still.
No water moved.
No spells rang.
No shadows stirred.
Ursula collapsed, reduced to her original, smaller form—unconscious, vulnerable, no longer tainted by the parasite. Her body drifted downward, coming to rest beside the trident that once gave her divine power.
Helios floated above her, chest rising and falling with labored breath. He stared at his spear, then at the weapon resting near Ursula's body.
Slowly, he reached down and wrapped his hand around the trident.
The moment his fingers touched it—
Power surged through him.
His body arched slightly from the force. It wasn't painful—no, it was liberating.
He could feel it—something dark and ancient, a weight that had wrapped around his soul since his arrival in this world, being purged. The strange energy that dulled his light, that corrupted his balance, was breaking apart.
He gasped softly.
The sea, once turbulent and wrathful, began to calm.
Above him, schools of luminescent fish returned to the edges of the trench. Coral glowed once again with soft bioluminescence. The abyss no longer groaned in pain.
It was over.
Helios closed his eyes for a moment, grounding himself.
Then, a hoarse voice behind him stirred the silence.
"So you got tired of hiding."
Helios turned. Kurai stood there, arms crossed, still battered, her gaze sharp.
He smirked. "Had to make an entrance."