The first thing Izumi tossed into the system was Ea, the Sword of Rupture.
Normally, since Gilgamesh had been erased, the treasures inside his Gate of Babylon should have vanished with him. But Izumi had snatched Ea before the King of Heroes disappeared—and by hurling it straight into the system at the first possible moment, he preserved it.
That was exactly why he moved so quickly:
He knew the moment Gilgamesh died, every Noble Phantasm he possessed would return to nothing.
As the sword was absorbed, the system responded immediately. A flash of light, a strange clink, and something new popped out—only to shoot straight into the system inventory before Izumi could even get a look.
He didn't mind.
Instead, he tossed in the next items.
The Greater Grail.
Avalon.
With a soft chiming sound, two more items appeared—only to vanish into the inventory as well.
Once everything was exchanged, Izumi finally opened the system menu, eager to see what rewards he'd received this time.
Three new slots glowed.
From left to right, he checked them one by one.
[Stone of Time]
A gem imbued with temporal power.
[Second Magic: Kaleidoscope]
Grants the user the ability to freely traverse parallel worlds; provides control over space, dimensional interference, and temporal travel.
Can also be embedded into tools and Mystic Codes.
(Note: World-travel usable only within designated world clusters.)
[Seed of a World]
Allows the user to generate a complete miniature world within themselves, becoming something akin to a Creator God.
Izumi's eyes widened.
The Stone of Time was interesting—but not shocking. A special gemstone at most. Maybe good material to craft some kind of magical-girl transformation device.
But the Second Magic—Kaleidoscope.
That was a bombshell.
The magic that could interfere with parallel worlds.
The power to manipulate space, warp dimensions, and even travel through time.
The same system that Kischur Zelretch Schweinorg used to craft his absurd artifacts—including magical-girl transformation wands and multi-world energy siphons.
The utility, versatility, and combat potential of the Second Magic was insane.
And the Seed of a World…
Now that was something Izumi didn't expect.
A complete micro-cosmos.
A literal internal universe.
This meant he no longer had to contemplate difficult theories about forming internal stars or leaping into SSS-class evolution—the system had simply handed him the perfect solution.
If he had a world inside him, then his Simulation: Star-Creation Atlas could be used without limit—and he might even be able to construct an entire cosmos inside himself.
Izumi's excitement exploded.
Without hesitation, he used both the Second Magic and the World Seed.
Only the Stone of Time remained unused.
The moment the Second Magic activated—
A torrential flood of information poured into his mind.
Endless magical theory.
Multi-world topology.
Dimensional friction formulas.
Temporal resistance parameters.
Instructions for embedding Kaleidoscope functions into Mystic Codes.
And much more.
At the same time, Izumi felt the space around him loosen—becoming something he could twist or compress with a thought.
His senses expanded outward, touching the countless parallel branches of the Nasuverse.
If he wished, he could step into any of them.
His overall power increased noticeably—though the system panel strangely showed no numerical change.
After reorganizing the new knowledge in his head, countless ideas surfaced.
He could now craft hundreds of Mystic Codes if he desired, especially since he still had the Einzbern alchemy pack.
But he didn't need that many.
More importantly—
He sensed a brand-new presence inside his body.
A world.
A blank, untouched world.
Izumi didn't panic. Instead he opened his status window.
[Izumi]
Race: Human (Hōrai Immortal), Pure-blood Dragon
Strength: A+
Endurance: A+
Agility: A+
Defense: A+
Mana: EX
Luck: EX
Overall Rating: SS+ (Five-Digit Class)
Unique Trait: Inner World
Skills:
Projection
Unlimited Blade Works
Imaginary Number Collapse
Third Magic: Materialization of the Soul
Infinite Martial Refinement
Flight Magic
High-Speed Divine Words
Dragon's Afterimage
Aurora Pillar
Grand Order: Atlas Sphere (Humanity Safeguard Sphere)
Second Magic: Kaleidoscope (Parallel World Interference / Time Travel)
Items:
Spear that Shines at the End
Alchemy Mega-Pack
Stone of Time
Looking at it, Izumi realized something.
Several skills had vanished.
Or more accurately—merged into the Second Magic.
Einzbern alchemy, Mystic Code blueprints, displacement magic… all consumed into the far greater umbrella of Kaleidoscope.
A new line, Inner World, now decorated the status list.
Izumi sighed wryly.
"Why does it feel like the stronger I get, the fewer skills I have on paper…?
Is that how high-level beings are? The fewer the abilities listed, the scarier they become?"
He shook his head.
Then, shutting the status panel, Izumi turned his attention inward—into the newborn world.
An endless blank plain stretched in all directions.
No mountains.
No rivers.
No seas.
Only breathable air and immense mana.
Mana so dense It almost hummed.
But as he focused, he understood why.
This world's mana was his mana.
After analyzing its structure, he discovered the truth:
This "small world" wasn't really small at all.
It was complete—perfectly functional.
And Izumi was its core, its master, its key.
He could bring people in at will—if he permitted it.
And inside, he was omnipotent.
A literal Creator.
All laws and rules bent to him.
He couldn't create life—yet.
But everything else was his to sculpt.
Grinning, Izumi began shaping his world.
At his thought—
The sky split from the earth.
Light filled the sky.
Mountains rose.
Rivers carved paths.
Forests spread.
A massive lake formed at the world's heart.
Grasslands unfurled like a green ocean.
Then—
A giant tree burst from the soil, rising higher and higher until it towered over a kilometer tall, casting a gentle shadow over half the plains before finally stopping.
Izumi nodded, satisfied.
"Perfect spot for storing… future guests."
His grin turned suspiciously wicked.
And since scenery required housing—
He began building structures along the massive tree trunk.
Dozens. Then hundreds.
A sprawling city in the branches.
If he ever traveled to worlds like Toaru Kagaku no Railgun or Black Bullet, this would be the perfect safe zone for rescued heroines.
So he needed a lot of space.
Thinking that, Izumi fully unleashed his creativity.
If not for his infinite mana, another magus would have collapsed long ago.
The world of Izumi was born.