Ais swung her longsword with unrestrained joy—one slash, one monster, clean and decisive.
She was having the time of her life.
This weapon was incredible. No—perfect for her.
Even after cutting down monster after monster, the blade showed not the slightest sign of wear or damage.
That durability alone was astonishing.
After all, the Noble Phantasms Izumi created were notoriously hard to damage.
That much, he was absolutely confident about.
Unlike weapons forged within the Dungeon—things that could chip, crack, or outright shatter—his creations operated on an entirely different level.
In terms of hardness alone, they surpassed even the so-called divine weapons of the Dungeon.
Having enjoyed herself thoroughly, Ais was practically glowing with excitement.
And before long, the group arrived at the Seventeenth Floor.
The seventeenth floor was special.
Because it had a Floor Boss.
A Floor Boss was the Dungeon's equivalent of a game boss—
A massive, powerful, and uniquely dangerous monster.
At the same level, defeating one was extraordinarily difficult.
Even adventurers of a higher level weren't guaranteed victory.
Its sheer size alone allowed it to exert far more power than its base parameters suggested.
A Level 4 Floor Boss could easily demonstrate combat power equivalent to Level 6.
And on the Seventeenth Floor, that monster was—
Goliath, the giant.
Izumi had come here for it.
He wanted to see whether his absurd Luck stat could make it drop something truly special.
After all, he'd already made a killing from the shop today.
That night, he was planning to perform a system sacrifice—
It had been a long time since he'd last used the system properly.
Might as well go big.
The group stepped into the vast, empty chamber of the Seventeenth Floor.
It was a gigantic hall, completely barren.
Only a single passage leading down to the Eighteenth Floor existed.
Whenever Goliath respawned, adventurers passing through would band together, defeat it, and turn this place into a temporary safe zone.
And today—
Just happened to be its respawn day.
Izumi and the others had impeccable timing.
As soon as they entered, the walls began to tremble.
Then, slowly—
A giant form began to take shape.
Seeing this, Izumi whistled lightly.
"Well, that's convenient."
So his Luck really wasn't lying.
ROOOOAAAR—!
Goliath let out a deafening roar and charged straight toward Izumi.
At Ais's side, her hand instinctively tightened around her sword.
She wanted to rush forward and clash with it head-on.
With her new weapon, she was confident she could solo Goliath.
Unfortunately—
This was Izumi's prey.
She didn't get a turn.
Facing the charging giant, Izumi chuckled softly and snapped his fingers.
A Pseudo-Void Slash cleaved toward Goliath—
And at that very moment, the entire Dungeon began to shake.
The sudden quake made everyone frown.
Izumi himself paused for a split second.
…The Dungeon got angry?
Not just the Dungeon—
All of Orario began to tremble.
"What's happening?!"
"Did the Dungeon enrage?!"
"What is this?!"
Panic spread instantly.
Eyes all across the city turned toward the Dungeon.
The Guild staff hurried to report the incident.
Inside the Dungeon, Izumi fell into thought.
So it really was reacting to his power.
His strength had stimulated it—forcing it to awaken.
Right now, he was simply too strong.
Even without divinity, his presence was already on the level of a god.
Power beyond regulation was not permitted within the Dungeon.
He'd probably already been marked earlier.
And now, when he attacked Goliath, it finally reacted.
Realizing this, Izumi smiled.
"In that case…"
"Let's make it a real mess."
He released his presence.
Instantly, the entire Dungeon went berserk.
Goliath roared in madness.
And Izumi became certain—
The Dungeon possessed its own will.
Crack—crack—crack.
From the surrounding walls, more giants began to emerge.
Seeing this, both Riveria and Ais turned pale.
"T-This…!"
Riveria was stunned.
What in the world was happening?!
Why was the Dungeon this furious?!
Izumi, however, understood the danger immediately.
At this rate, the Dungeon would keep throwing monsters at him endlessly.
If it escalated far enough—
Even Leviathan, Behemoth, or the Black Dragon might emerge.
That would be troublesome.
Very troublesome.
"…Yeah. Time to leave."
Without hesitation, Izumi controlled the Pseudo-Void Slash and swept it across the battlefield.
In an instant—
Every giant and monster that had appeared was annihilated.
Riveria and Ais were left completely speechless.
They had never witnessed power like this.
…Was this man a god?
Countless questions flooded their minds.
Meanwhile, the girls stared at Izumi with sparkling eyes full of admiration.
It was impossibly cool.
Golden light tore through the air, enemies turning to ash in seconds.
How could anyone not find that cool?
After clearing the area, Izumi casually collected the massive pile of drops with his spatial ability.
Then—
He activated spatial transfer.
In the blink of an eye, the entire group vanished from the Seventeenth Floor—
And reappeared right in front of Izumi's shop.
Ais and Riveria froze.
Instantaneous transfer from the Seventeenth Floor to the surface—
And Riveria hadn't sensed a single fluctuation of space or magic.
That level of control was absurd.
Only after Izumi left the Dungeon did the tremors finally begin to subside.
Even so, the damage had already been done.
Several adventuring parties had been wiped out.
Low-level monsters had even spilled out of the Dungeon entrance.
Back in Orario, Izumi and the others saw adventurers forming a blockade at the entrance.
Among them were many members of the Loki Familia.
Their sudden appearance drew plenty of attention.
Including that of Ais's devoted admirer—
Lefiya Viridis.
The elf practically sprinted over the moment she saw Ais.
"A-Ais-sama!!"
"Thank goodness you're safe!"
"We were so worried you might've been in danger!"
She was clearly thrilled—but also nervous, as if afraid Ais might find her annoying.
Izumi casually glanced at the suspender-clad elf.
Just from the outfit alone, one could easily imagine what was going on underneath.
Mentally giving a thumbs-up, Izumi spoke.
"Alright, thanks for the help today."
"If anything comes up, you can find me at the shop."
"I probably won't be able to enter the Dungeon anymore."
He sounded a bit helpless.
The Dungeon had clearly remembered his presence.
If he went back in, another rampage was inevitable.
Hearing that, Riveria and Ais exchanged glances and nodded.
Riveria, in particular, knew this had to be reported to Loki.
After all—
The Dungeon's disturbance had been caused by Izumi.
And now they finally understood why Loki and Finn had warned them—
That this man was dangerous.