MMMS 112

Ryuuto didn’t respond to Iskandar’s question.

Instead, a dagger appeared in his hand—a strange, gleaming thing of cruel elegance. Its surface shimmered like oil on water, refusing to reflect the world around it.

Gilgamesh’s eyes narrowed.

Even if he wanted to forget, he couldn’t. Not that blade.

Erosion.

The same cursed weapon that had once sliced through his wrist like silk.

Ryuuto held it lightly as if cradling a relic.

“Gilgamesh,” he said, his voice calm—too calm. “I should thank you. If it weren’t for you, I might never have seen Mother again.”

His gaze didn’t shift. It pierced straight through the King of Heroes.

“You once claimed that all things in the world originated in your treasury. That every treasure was merely returning to its rightful place after your death. This blade is no different. Erosion—once yours, then Caster’s… and now mine.”

Then, without warning, he drove the dagger into his own chest.

There was no scream. No hesitation.

Only a quiet exhale, almost euphoric.

“Praise her… exalt her,” he whispered, blood running in thin golden streams down his front. “The mother of all evils, descending from beyond the sea—Tiamat.”

"What... is that?" Artoria stared toward the heart of the battlefield.

Her Master—no, something that had once been her Master—was beginning to change.

The countless weapons that had impaled his body just moments before, all remnants of Gilgamesh’s wrath, now melted into him as if claimed. Swords dissolved. Skin reformed. Strips of red and black cloth coiled around his bare torso like serpents, shrouding his once-human frame.

And then came the horns.

Twin crescents—demonic, regal—arched from both sides of his head, blood-red with obsidian veins. They curved back like a crown, framing a face that still bore its eerie beauty—too delicate, too perfect, like a sculpture of a long-forgotten goddess.

And from the center of his chest, jutting out as if embedded in his very soul, protruded a single, horn-shaped dagger hilt.

Her sister’s dagger.

The Erosion Blade.

“Through Erosion,” he said quietly, addressing Gilgamesh, who stared back in silence, “my flesh is now bound to the mother beyond this world.”

Gilgamesh didn’t speak.

Ryuuto smiled faintly. “You do not know this yet, but this blade... is the only mortal weapon that has ever scarred Mother’s soul.”

Gilgamesh’s eyes narrowed.

Without ceremony, every trace of damage Ryuuto had sustained vanished. Flesh knit. Blood evaporated. He stood tall once more—no longer just human, but something vast and terrifying.

He opened his arms as if embracing the world.

“Allow me to reintroduce myself. I am the child born alongside mankind—formed when the Mother of Creation, Tiamat, first breathed life into humanity.”

And then the world changed.

From where he stood, a wave of pale light unfurled in every direction, sweeping across the battlefield like the silent bloom of a nuclear blast. The ground shifted, the air warped. A dome expanded outward, swallowing Rider’s desert.

Artoria instinctively shielding her eyes. “Rider’s world is being… eroded?”

She turned toward Morgan, whose face had gone pale with realization.

“Is this a Reality Marble?” Artoria asked.

“No,” Morgan whispered. Cold sweat traced a line down her temple. “This isn’t a Reality Marble. It’s… a Conceptual Bounded Field.”

Within the center of that field, standing tall beneath the spiraling sky of rebirth, Ryuuto raised a single hand.

He spoke one word.

And with it, the planet itself rolled backward.

A memory not of time—but of meaning.

Of origin.

“World Rebirth—Nega Genesis.”

…

“Mother! Look! Look at me!”

The clear voice of a boy echoed through the sun-drenched forest, full of innocent pride.

“I tamed the Uridimmu all by myself!”

Ryuuto raced between ancient trees, riding astride a massive lion-beast with gleaming obsidian fur. He clung to its thick mane, laughing as the creature bounded over roots and underbrush with wild grace.

“Your method really worked, Mother! Thank you!”

He lifted his gaze toward the figure watching him from the forest edge—radiant and still, smiling softly.

She stood in the air as if the earth itself dared not touch her.

Long, mercury-silver hair drifted around her in slow waves. Her beauty was haunting—refined and inhuman. Cross-shaped pupils, gleaming like violet gemstones, glowed in her eyes. From either side of her head, curved lapis lazuli horns curled outward, majestic and alien.

Her body—pure white, unmarked by blemish or imperfection—shimmered in the sun. She wore no clothes, her figure at once ethereal and maternal, slender yet lush, like a sculpted myth unbound by modesty.

Ribbons of imaginary numbers wrapped around her arms and legs like shifting runes. Lightning-shaped stigmata glowed on her lower abdomen, symbols of a existence older than history.

She was perfect.

She was terrifying.

She was Mother.

Ryuuto’s cheeks flushed red. He quickly turned his face away and patted the beast beneath him.

“C’mon. Let’s go somewhere she can’t see us.”

“■■■■...”

The Uridimmu shuddered at the command, ears flattening in fear. It looked up at him, then over to Tiamat. She answered with a nod and an indulgent smile.

Only then did it move, galloping into the deeper forest.

Ryuuto leaned forward as they ran, ducking under low branches, the wind threading through his hair. Trees blurred past in streaks of green. Birds with radiant wings took flight overhead, soaring across a sky that had never known pollution or time. Below, small mammals darted through the undergrowth, scattering at the sound of thudding paws.

This was no ordinary forest. It was the world as it had once been. Untamed. Unfallen.

Alive.

The breeze cooled his skin, tinged with the scent of fresh leaves and ancient soil. Every second here felt like a gift.

With his arms spread wide, he tipped his head back and shouted toward the heavens.

“I am free!”

…

After an afternoon of play in the sun-dappled forest, Ryuuto returned to the cave nestled at the base of the breathtaking mountain.

“You’re back, Ryuuto. Just in time—dinner’s ready.”

Tiamat emerged from the cave entrance with a gentle smile, as if she'd known the exact moment he would return.

“What are we eating tonight, Mother?” he asked eagerly, hopping down from the magical beast’s back and running to her side.

“Charcoal-grilled brachiosaurus steak,” she said, ruffling his hair with affection, “and fresh mosasaurus sashimi.”

“Oh… oh.” he blinked, his excitement briefly overtaken by something else.

As she leaned down to pat his head again, gravity did its work—accentuating her already ample chest. Ryuuto’s face turned bright red and he quickly looked away, heart thudding for reasons he couldn’t quite explain.

“What’s wrong?” she tilted her head, puzzled by the way he shook his head so fiercely. Her long silver hair shimmered around her, catching the sunset like strands of starlight.

“Hehe… you must be hungry,” she said with a warm laugh. “Come on. Don’t forget to wash your hands properly, okay?”

“Mm… okay! Mother!”

Hand in hand, they walked toward the cave. But just before stepping inside, he paused and glanced back.

The setting sun bathed the world in gold.

Out across the open plains, Uridimmu and Ugallu lounged in the fading light, their massive forms peaceful and at rest. Nearby, Mushmahhuu had disguised itself as a fruit-bearing tree, waiting patiently to ambush passing herbivorous dinosaurs. High above, in the azure sky, the winged serpent Bashmu soared in lazy spirals, so majestic that even the fiercest pterosaurs had taken shelter.

It was all so vast. So unreal.

So beautiful.

Ryuuto’s chest swelled with quiet emotion. This world—his world—felt like a dream he never wanted to wake from.

And with that thought, a memory surfaced.

That first day.

…

“We’ll be living here from now on.”

Tiamat stood before him, her fingers nervously fidgeting with one another. She wasn’t floating or glowing or speaking with the voice of a goddess. She was just… a woman, vulnerable and unsure.

“This world… it’s only the two of us,” she murmured, staring down at the earth. “But… I think I’m okay with that. If you are.”

Her voice was almost a whisper.

“So… um… what do you think? Are you willing to live here with me?”

Ryuuto looked up, his eyes wide, a smile blooming across his face like sunlight through leaves.

“I love it here! And I want to live with Mother forever!”

For a moment, she just stared at him. Then, wordlessly, she dropped to her knees and wrapped him in her arms, holding him close like something infinitely precious.

“Yes…” she whispered. “It’s a promise.”