Why level up in isekai, when you can hack your way through

Chapter 8 - [B.o.W] 21-Year-old shut-in Vs 21,000-Year-old shut-in (Part 1)

She angrily said, "SILENCE!"

"You don't even know or understand your own words! You insignificant being!"

I replied gritting my teeth, "Sure I don't understand it but what I understand is you're a coward."

...

At an invisible speed, she approached and sent him flying.

Ack! Fuck! I could feel she penetrated my defenses so hard I could feel a crack in my chest.

And to provoke her further, I said, did I strike a nerve or simply tell the truth?

"So mortal you've chosen death? I tried showing mercy but I'll kill you now!" she said.

To which I responded, "Do your best Miss Demon Queen. I don't care if you don't want to live in this place but I've got no choice but to go through you!"

She responded, "You impertinent fool! You cannot defeat me; I've been training in this place ever since I was born. A mere mortal like you could never hope to defeat no matter how strong you are."

"I've mastered the oldest and wildest of arcane magic, transcended my demonhood beyond my father's, and gained mastery over physical and magical combat without ever skipping a day. There's no chance for you to win in any way possible."

So you're saying you've been honing your techniques up to this day? I asked.

"Yes," she replied.

"So how old are you?" I questioned

To which she questioned back, "Why'd you ask?"

You told me you've earned mastery and reached the peak of combat so I want to know how much did it take to reach this level.

She reluctantly answered, "21,000 Years."

But then my tongue slipped, "So, you're an old hag then?"

And with that, she was massively triggered by my comment.

"The fuck did you just call me!? You mortal, I'm going to murder you!"

HEY! First off stop calling me mortal! My name is Kazuki! Or for short Kaz! And second, do your fucking best! Flashes middle finger

Gritting her teeth she said, "Prepare for your funeral."

I replied, "Sorry funeral doesn't exist for me."

"DIEEEEE!!!"

Very well then, I'll give you a battle worthy of those 21,000 years, so do your best trying to kill me.

(Athena, you know what to do.)

( ( "Understood... but I warn you this opponent is not an easy one, if possible dodge her distortion attacks." ) )

(Okay.)

Charging in while drawing a slash from the Emberblade from the right, she shifted her position to left in an instant dodging. My eyes weren't able to see a thing with all the active passive skills and buffs.

Before I could turn back and attack, she whispered something into my ear from behind.

"It's useless"

Then she cast a barrage of fiery and demonic spells, which I didn't know of. More so, her unmatchable speed made it impossible for me to land a successful "Consume" on her.

Then as I got hit she asked with confusion on her face,

"How are you unscathed after facing all those attacking without dodging?"