Isekai Adventure in the Dimensional Cube

Before reaching Lv.4, Rephia had only one skill.

It was a skill that could amplify her magic effects, limited to attack magic, and the enhancement effect would double.

The skill was named — [Fairy Chasing].

Due to this skill and her outstanding "Magic Power" parameters, Rephia could wield magic firepower comparable to Lv.5 while at Lv.3, thus being regarded as Revilia's successor.

Upon reaching Lv.4, Rephia finally awakened her second skill.

This skill was born out of the elf girl's admiration for two swordsmen, her determination to catch up with them and not fall behind, and her desire to assist them in any way possible.

This wish transformed into the experience points needed for Divine Power, appearing on her back as she leveled up.

That was the skill Rephia activated at this very moment — [Sword Spirit Chasing].

Unlike [Fairy Chasing], this skill wasn't a passive amplification but an ability that could be activated subjectively.

When activating, Rephia had to choose between two effects.

One: Transform the chanted magic into a small crystal sword and put it in a standby state. The longer the standby time, the stronger the magic within the crystal sword becomes until spiritual power is exhausted. The release of standby magic can be chosen freely.

Two: Transform the chanted magic into a small silver sword for autonomous attack. The more attacks, the weaker the silver sword becomes. The number of attacks is determined by consumed spiritual power, up to a maximum of ten times.

This skill was extremely flexible, rare, and strategic.

Each effect could render Rephia's battles highly variable and diverse. If utilized correctly, it could even allow her to surpass higher-level opponents.

Now, Rephia had activated the [Sword Spirit Chasing] skill, triggering the first effect, transforming her recently chanted magic into a small crystal sword in standby state.

From this moment, Rephia's spiritual power would continuously be depleted until fully exhausted, while the standby magic within the crystal sword would persistently grow stronger, intensifying to a fearsome degree.

"Rephia?"

Ais seemed to notice the crystal sword hovering next to Rephia, showing an expression of surprise.

"Skill?"

Reiger noticed too, pausing momentarily, somewhat bewildered.

Yet Rephia didn't stop, allowing the crystal sword to hover beside her while chanting the next magic with determination in her expression and voice.

"[Signs of the end, pristine white snow.]"

"[At the twilight hour, stir up the fierce winds.]"

"[Sealed light, frozen land.]"

"[Snowstorm blowing, threefold harsh winter — My name is Alf.]"

Rephia chanted Revilia's ice-affinity wide-area annihilation magic.

"[Frenzied Fimbul Winter]!"

The magic array unfolded beneath Rephia once more, not being released immediately like the earlier [Arc-shaped Beam], but transforming into a small silver sword, hovering to her other side.

The elf girl stood with her wand, crystal sword floating on the left, and silver sword on the right, looking impressively powerful.

Anyone seeing those two swords would involuntarily direct their gaze to the swords held by Reiger and Ais.

In Reiger's hand, a transparent crystal long sword emitted a dim glow.

In Ais's hand, the silver dagger's blade shimmered with cold light.

The two swords were exactly identical to the floating crystal and silver swords beside Rephia.

That was as expected.

Because it was due to the elf girl's admiration, worship, and affection for these two that she awakened this skill.

"Boom!" "Boom!" "Boom!" "Boom!"...

Suddenly, the water surface of the channel exploded, spraying water droplets skyward, as a series of surprise attack fish monsters shot towards Rephia.

Rephia's repeated use of magic had evidently stirred the monsters underwater, causing them anxiety and frenzy, prompting them to attack her.

"...!"

Only then did Reiger and Ais react, instinctively attempting to dash in front of Rephia to shield her from the surprise attack.

This was almost a reflex.

In Reiger and Ais's minds, although Rephia was a Lv.4 Elf Mage, she was a rear guard type, unfamiliar with close combat techniques, and reliant on allied protection to unleash magic, shielding her allies and defeating mighty foes with a decisive blow.

If enemies closed in on her, even monsters ranked below her could inflict damage.

Thus, Reiger and Ais impulsively sought to protect Rephia from the monsters.

Yet what happened next stunned them.

"Swoosh!"

As the surprise attack fish lunged at Rephia, on the verge of biting into her, the silver sword hovered at her right moved, penetrating the air with a faint sound and charging towards the fish.

"Boom!"

The silver sword swung down fiercely, unleashing a vast wall of ice and snow, roaring forth and engulfing the surprise attack fish.

"Crunch crunch crunch—"

Without any suspense, the ambush fish in the snow directly froze into ice.

The silver sword continued to sweep through, imitating the technique of spreading snow, smashing wind and frost, freezing part of the water channel.

"[Release]!"

Seeing a large group of ambush fish being successively frozen by the silver sword that seemed to be able to release ice magic, Rephia shouted charmingly, causing the crystal sword on her left side to suddenly shatter.

"Boom!"

Instantly, a huge flash, not much different from the [Arc-shaped Beam] personally released by Reiger, surged out like a torrent, bringing a roaring explosion. Wherever it passed, whether it was the frozen ambush fish or the metallic blue crabs climbing out of the frozen water channel, all seemed to be annihilated in the light, evaporating cleanly in an instant, without a trace.

The great flash continued to rush forward, breaking through the frozen water channel and the flowing water that hadn't frozen, vanishing into the darkness at the end of the passage.

"———"

A strange silence descended upon this space.

At this moment, whether it was Rephia, who released the [Arc-shaped Beam], or Reiger and Ais, who were dodging in haste, they all fell silent, speechless.

The three of them looked at the sewer that was smoking everywhere from the impact of the great flash, with many spots damaged; one pale, two speechless.

"H-how did this happen?"

Rephia's pretty face turned pale as she exclaimed in panic.

"I was already being very restrained!"

Hearing this, Ais silently glanced at Reiger.

That look seemed to say a sentence.

"Did you teach her that?"

Damn it, I taught her!

"Rephia..."

Reiger approached the elf girl, speaking helplessly.

"I already told you that this place wouldn't hold up, didn't I?"

Hearing this, Rephia looked very aggrieved.

"B-but I didn't use fire magic."

The girl seemed to be crying, making Reiger sigh.

"It's okay, Rephia." Ais instead comforted the elf girl, stammering, "Just now… you were amazing."

Indeed, quite amazing.

The power of that [Arc-shaped Beam] just now, although not reaching the Lv.7 firepower of Reiger, was definitely top-notch at Lv.6.

Having magical firepower comparable to Lv.5 at Lv.3, the elf girl's firepower clearly grew stronger after advancing to Lv.4.

With the crystal sword's reinforcement effect from [Sword Spirit Chasing], if Rephia poured the maximum scale of spiritual power into this spell without restraint, her firepower could very possibly touch the edge of Lv.7, or even cross into Lv.7 level.

After all, theoretically, as long as Rephia still had remaining spiritual power, the magic in the crystal sword would continue to strengthen in standby mode until Rephia's spiritual power was exhausted.

In other words, if she desperately disregarded spiritual exhaustion, the current Rephia indeed had a way to unleash super-powerful magic of Lv.7 level firepower.

In addition, with [Sword Spirit Chasing]'s silver sword capable of instantaneously firing magic several to ten times like a magic sword, and as an autonomous attack type, Rephia truly deserved Ais's evaluation of being "amazing" now.

"Is this your newly awakened skill?"

Reiger, not bothering anymore about the excessive damage caused by Rephia, asked with some curiosity.

"Y-yes."

Seeing Reiger and Ais both looking at her curiously, Rephia, knowing well under what mindset she awakened her new skill, blushed.

"This is the new skill I discovered upon leveling up, and Loki even said she's never heard of this type of skill; it's definitely a super rare skill..."

Rephia's ears turned red, yet she mustered the courage to say this, seemingly wanting to tell the two idols in front of her that she had become stronger.

"Rephia, truly impressive."

Ais immediately praised candidly, making Rephia's face turn redder, feeling more bashful.

"[Sword Spirit Chasing]... is it?"

Reiger gazed at Rephia inconspicuously.

As remembered, in the original work, Rephia also awakened a second skill upon reaching Lv.4, but that skill was not this one.

However, this skill now seems stronger than the one in the original, and much stronger at that.

"Isn't it not a bad thing?"

Understanding this point, Reiger also felt relieved.

"As long as it's not a bad thing, then it's fine."

After all, Rephia is also his companion, and naturally, he hopes Rephia, like Finn and Ais, becomes stronger than the original.