After considering the enemy's abilities, reexamine the spells to be used and decide on the best reinforcement configuration.

We consulted with the remaining amount of magic (mana) and the amount of consumption, and came up with the best solution.
As a result, four spells were decided to be used.

The first spell to be used on Satsuki...
It is, first and foremost, a physical burst.

I cast the spell and let it take effect on Satsuki.
And then...

What the hell? What's this, power is coming out of my body. ......! Seriously, that's amazing ......!

Satsuki's tension went through the roof.
A mixture of magical power and aura overflowed from her body with a radiance that was visible to the naked eye.

'Oh, I know that spell, too! It's the spell you used on Mee and Irene in the fight against the Orc Emperor, isn't it?

'Yeah. It's an advanced spell that greatly strengthens your overall physical abilities, including muscle strength and agility. This spell alone has the power to overturn the difference in strength by one rank. So, next.

The next spell to be used is the Heat Weapon.
This is an intermediate level magic that corresponds to the upper compatibility of enchanted weapons.

When I finished chanting, a red-orange glow of magic power like a blazing fire appeared on Satsuki's sword.

'Hmmm? Magic on the sword ......?'

'Yeah. Satsuki, use your sword to lightly slash this rock wall.

I said and pointed to Satsuki with my hand on the rock wall beside me.

'......? No, if it's only the skin that's rocky like a rockworm, but a real rock is indeed hard to cut. ......'

'No, you don't have to be so nervous. Just take it lightly.'

'Hmm? Lightly, like this ......? What the hell is this?

When Satsuki lightly slashed the rock wall of the tunnel with her sword, the rock melted from the point where the tip of the blade touched it, and the blade slid through like a knife into soft butter.

'That is the effect of a heat weapon. The amount of heat contained in its magical power is comparable to that of volcanic magma. The weapon itself is protected by the magic of heat protection, so don't worry.

'Huh, ...... what is this? It can easily cut a rockworm's skin in half.

Satsuki was so impressed that she slashed through the rock wall with her sword.
In fact, it was only due to Satsuki's skill that she could slash with such speed, but there was no doubt that the spell would greatly increase her attack power.

Next, I cast a third spell.
It is an advanced defensive spell, a physical barrier (force field).

The spell is completed and the magic power is sucked into Satsuki's body.

'Let's see, ......, what's this?

'A force field - you can think of it as a spell that puts an invisible barrier around the target's body. Even if that monster attacks, it should completely nullify damage up to two shots. This is just an insurance. Basically, you should try not to take a single hit.

'Okay, got it. ...... Ah, but if it means damage, won't it prevent me from getting entangled in tentacles?

'Yeah, that's how it works. If you do a clamping attack, I'll just absorb the damage, but I'll use this last spell to deal with the tentacles.'

I said, and cast the fourth spell.
Then, after explaining the effects of the spell...

'...... Heh, really? That means you can't lose anymore, right?

'Oh, that's terrible. ...... I feel rather sorry for the tentacles. ......'

Satsuki and Mee let out such thoughts.
Hearing this, I smiled.

'Well, I think I've crushed all the threats within sight. Since that's the case... go ahead and rampage to your heart's content, Satsuki. My magic will protect you.'

At my words, Satsuki made a face of great emotion.
She looks like she's about to cry.

'Will... I want to hug you right now!

'...... Please stop. You're killing me. Didn't you hear the explanation of the effects of the fourth spell?

'Hee-hee. Then I'll do it when I get back!

'...... I see.'

I'm kind of afraid of what's going to happen after the battle is over, but I'll figure out the best thing to do at that time.

'Ooooh, I'm excited! I'm off then!

Satsuki said and jumped out of the tunnel lightly.

Then she ran down the slope at a tremendous speed.
Her speed was much faster than that of the Rock Servant, several times faster.

I emerged from the tunnel and called out to Satsuki's back.

'Satsuki... I'd tell you to be careful, but I'm afraid my words might have the opposite effect on you! So I'll put it this way: do what you do best! You know how to do that better than I do!

Satsuki raises her hand lightly as the voice reaches her.
Satsuki then ran down the path with the speed of a gale, and quickly plunged into the swarm of rockworm larvae.