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The Giant Rat King held a mysterious purple colored crystal on its chest. It didn't imbue it with any sort of power, but it was indeed strange. However, Monica and her friends, although cautious, paid it no mind when they detected it didn't make it any stronger.

"GRYSHAAAH!"

The battle began right away, as the Rat King roared with fury, leaping into action. Its movements were fast and powerful, holding great strength and weight in every move it unleashed. Its big and spike-covered tail was a deadly weapon it used constantly, trying to sweep the girls off their footholds with it.

Its sharp fangs could tear through any shield or magic barrier, and the girls were constantly forced to escape and evade the Rat King's attacks. Monica unleashed all of her curses against the ferocious beast.

The monster's magic was sealed, its movements constantly paralyzed, and it couldn't fight properly, although its strength, speed, and heavy weight made it a lethal and threatening foe nonetheless.

Maria had to put her all to fight this being, she quickly commanded her party members to aim at the legs, as they slowly began inhibiting the ability of the Rat King to move properly. Its legs paralyzed and hurt badly; it couldn't even drag itself normally anymore.

However, it could still move by simply pushing its own body, and its lethal tail couldn't be paralyzed for some reason either. Its sharp fangs made for a deadly attack, the girls had to constantly step back and think their next move carefully. Slowly, they began weakening it by firing magic from afar.

"[Dark Arts Magic]: [Accursed Black Flames]! [Abyssal Star]!"

Without many other options, Monica decided to go all-out, unleashing flames that burned the beast and cursed it at the same time, while a gigantic sphere of darkness descended.

This was the spell she had once used against Blake on their small fight, which ended exhausting her severely. The reason why she hasn't used it before was because he had told her it was a high-consumption spell she should only use in her most direst of moments, not right-away.

An emergency spell, to say the least.

BOOOOOOMMMM!!!

The sphere of darkness landed over the Rat King, completely consuming him, and engulfing him into a deadly explosion of pure destruction. Its flesh quickly was roasted, as it died after much struggle.

"W-We did it..." Monica sighed, gasping for air, she felt her body quickly beginning to grow stronger.

Defeating the Rat King helped her gain a few more levels, slowly recovering her MP and HP by a certain amount with each Level, although it was a small amount, and not 100%, but it helped her not fall unconscious from having used all her Mana. Nonetheless, she was really exhausted.

"W-We did it!"n0veLusb.c0M

"Finally... Yaaay!"

"I-I can't believe it... Lady Monica, we completed a C- Rank Dungeon!"

"We couldn't had done it without your amazing magic!"

"With such strength, your father is surely to be proud of you now!"

"Maybe you could finally inherit your territory?"

"Y-You all are getting a bit hasty..." Monica sighed, although she smiled a bit relieved it was finally over. Her weak heart now gaining even more confident. "But I guess you're not wrong... With this strength, maybe I can protect my territory much better than before... I wonder if big brother would be proud..."

As the girls relaxed and sat down over the dungeon's floor, they didn't realized something important, the Dungeon Boss Treasure Chest had yet to appear.

The Rat King's corpse began to slowly move, twisting around, as cracks appeared over its chest, where the purple crystal was.

And something else surged from within... humanoid, yet monstrous in shape at the same time.

"Fufufu, of course he would be proud! I do wonder, would you be happy if I brought you to him?"

The tenebrous, demonic voice of a female entity echoed across the entire floor. An aura of darkness and demonic energy sent chills down the spines of the girls.

"W-What? Huh?!" Monica was shocked as she saw the entity appear out of the Rat King's corpse.

It had a sleek, slim appearance, covered on black exoskeleton, with long arms and sharp, creepily long claws. It had a thin, fleshy head with several eyes spread across its body, and two mouths to the left and right.

Long purple hair waved behind her horrendous-looking head, as her slim, yet ugly appearance sent immediate horror into the hearts of Monica and her party.

"W-What is that?"

"A-A demon?"

"N-No..."

"Why...?"

As the girls panicked, the demoness giggled.

"Fufu, you're all so relaxed, girls." She laughed. "How about we make things more interesting~?" She pointed her long finger at Monica. "You're going down first, Monica Darkage. I was told by my Lady Lilith that you're our primary target. Fear not, your death will be painless... and swift! Later, I'll play with your little friends. See? I am quite the benevolent lady!"

FLAAAASH!

A beam of demonic red and purple energy surged from the demon's finger, reaching Monica in an instant! She couldn't even react, completely shocked of what was occurring in front of her. It could even be said she was paralyzed out of horror.

"L-Lady Monica! WATCH OUT! [Silver Shield Spirit]!!! [Maximum Defense]!"

One of her friends, named Eliana, stepped in, protecting her with her Silver Shield Spirit, and activating the spirit's Maximum Defense Skill, increasing its total defenses by five times for ten minutes.

BOOOOOOOMMM!!!

However, that wasn't enough, the shield only resisted around ten seconds, enough for Eliana to push Monica away from her range.

"A-Ahhh... Ugh...!" Monica quickly came back to her senses, only to see Eliana's body in front of her, a big hole in her stomach, bleeding out severely.

"L-Lady Monica... R-Run..." Eliana muttered, vomiting blood, her eyes' light slowly fading away, as she stopped breathing.

"E-Eliana... Eliana?! N-No... No! NO! ELIANA!!!" Monica screamed in horror in front of her dead friend.

"Oh my, did I miss my target? Well, she jumped straight into my death beam! What an heroic display of beauty." Smiled the demoness. "But I won't be missing this time though~"

FLASH!

"Lady Monica!!!"

The rest of Monica's servants screamed, trying to help her, but they were too slow.

The demon was already in front of Monica's shocked body, her long claws pointing at her body.

"Monica Darkage, this is your end!"

CLAAAAASSSH!

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