Reincarnated As The Hero’s Daughter: Wait, Why Is My MP Not Running Out?

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I reached Lilith's chest with Furoh, as I managed to pierce through her chest after Furoh unleashed a storm of dragon flames against her to distract her. Lilith's various arms with her cursed weapons attempted to slice me midway through, but rays of holy light came from the skies, as my mother's mirages stopped her right in time for my blade to reach her.

CLAAAASHH!!!

I felt my sword slowly slicing through her incredibly tough skin, as I gritted my teeth and continued pushing forward, reaching her tough bones, and shattering them, and then slicing through anything else until I sensed something, an enormous quantity of Demonic Power coming from within the interior of her chest.

"Aaagghh! S-Stop, don't you dare…!" Lilith roared furiously, as she suddenly destroyed my mother's Mirages.

Her enormous arms quickly moved towards me to grab me and throw me away, but Furoh quickly defended me, turning into an enormous dragon similar to Agni and singlehandedly stopping her. However, Beelzebub also appeared, supporting him by unleashing hundreds of Darkness Spheres.

"Uugh…! You persistent little rats…!" Lilith cried furious, as I reached the depths of her chest, finding her glowing True Demon Core. "Stop! Don't you dare!"

"Divine Dragon Meteor!"

Gathering all of my Mana and Dragon Force into my body and sword, a storm of divine flames exploded out of my weapon and body, shaping as dozens of furious dragons made of golden flames, and impacting Lilith's Demon Core while I pointed my weapon and swung my blade with everything I had!

The enormous impact unleashed a gigantic amount of smoke everywhere, as I felt as if my sword hit something almost completely impenetrable. The moment I opened my eyes…

"Eh?"

"You're going to need more than wits to pierce through the Demon Core of someone such as myself!"

Lilith suddenly began to laugh, as if her entire desperation was a whole act! In mere seconds, countless tentacles emerged out of her open flesh, trying to catch me!

I moved almost instinctively, slicing through all of them while gritting my teeth. Her Demon Core was so hard that even all my strength was incapable of even scratching it! Is it harder than even a diamond?!

Countless more tentacles appeared nonstop as I conjured two Dragon Novas at the same time, firing them at separate directions and burning through the flesh of Lilith.

BOOM! BOOM!

However, her flesh immediately regrew anew, and even bone blades began to grow everywhere, trying to pierce through me!

CLASH! CLASH! CLASH!

I evaded and parried as many as I could, but I was being left without many options now…!

If only I could change into my Demon Slayer Class right now… however, my Spirit Master Class is currently buffing everyone, if I change it now, I will end up weakening rather than growing any stronger.

"Alice, is there a way to utilize all this EXP I've accumulated? Leveling up Skills won't do much of a difference, right?" I asked desperately, evading tentacles, and destroying bones as I tried to not run away too far from the Demon Core exposed to me.

"I am already calculating something… You've currently accumulated over a million EXP due to all the monsters that had been slain not only by you but the rest of your family and friends… Rather than fixing any functions, perhaps adding something new should do the trick…" She said.

"What? Is there something new?" I wondered.

"Well yes, and that's a Subclass!"

"Subclass?!"

Ding!

[You have exchanged 1200000 EXP]

[System has been restructured permanently]

[A new function has been unlocked: [Subclass]!]

[Your [Subclass] has been automatically set as [Alchemist]!]

[You learned the [Alchemy] Skill]

"This is…?!"

"It is similar to Classes, with this, you can have two at the same time, pretty much! You even gained a new Skill and everything, but that can be ignored for now, using System Modification, you can modify the Alchemist Subclass into some of the other Classes you've modified before!"

"Then with this, I can have Demon Slayer on top of Spirit Master!"

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<#23a System>

[System Owner]: [Sylph Naturia Bravo]

[Magic Circle]: [Tier 2: Rank 8: Elemental Magic Circle]

[Physique]: [Tier 2: Rank 3: Yggdrasil's Eden Physique]

[Level]: [1/#523a]

[Class]: [Spirit Master]

[Subclass]: [Alchemist] -> [Demon Slayer]

[HP]: [1/1]

[MP]: [20/20]

[Strength]: [89] -> [150]

[Defense]: [3] -> [1]

[Magic]: [50] -> [100]

[Resistance]: [10] -> [1]

[Agility]: [50]

[Luck]: [-10]

[Charm]: [-100] -> [-200]

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I quickly lowered my own Charm to a minus -100 once more, surpassing all the limits I had before, most likely thanks to this new Subclass, as I felt my blade suddenly gain a red and bloodthirsty aura! The power of the Demon Slayer Class is already activating… the power to deal incredible bonus damage to True Demons and even pierce through their defenses.

However, when I lowered my Charm to -200, something very weird began to happen, my entire body began to grow even more scales, and I looked slightly monstrous, more than before. Alongside that, an intimidating black aura emerged from my body, suddenly intimidating even the tentacles of Lilith for a few seconds!

"T-This presence…?! G-Get off my chest already!" The enormous True Demon shook the ground furiously, but I didn't let go, as I quickly reached her Core once more and then pointed my sword at the crystal.

"RAAAAH!"

FLAAASH!

My sword unleashed a bloodthirsty red aura, as it suddenly began to slowly pierce through the crystal!

CLASH!

"Unghh?!"

Lilith cried in agony as she suddenly couldn't move anymore.

"S-Stop…! DON'T!"

I felt as if my sword was slowly getting through the Demon Core, centimeter by centimeter. I had to grit my teeth and boost my strength using my stat shuffle spell to the limit, putting all points into Strength alone!

CRACK… CRACK…!

"A-AGGH…! I can't be defeated by you! Not a little girl!" Lilith began to panic, as her arms quickly reached up to me, but seconds before grabbing me, a flash of red light emerged from within her core, countless cracks began to come out from within, and then… it shattered!

"Demon… BREAKER!"

CRAAASH!

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