First Dungeon Invasion

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[Alert!! A team of four adventurers has entered the dungeon!!]

"Huh, what's this? Are these the adventurers you said want to take the dungeon core and kill me? What should I do now?" Malenia panicked as her life was just getting better, and now there are already more problems coming.

[Calm down, Mistress. There are 3 F-rank and 1 E-rank adventurers. You should use all of your summons. That should be enough to deal with them.]

"Then use all the summons I have." Malenia did as the system told her to do and used both summons.

[Congratulations, you got:

Rank 9 Goblin! (From daily summons)

Rank 6 Blood Vampire Dante!!! (From the beginner package reward)]

As Malenia used both her summons, two monsters emerged from the ground in front of her. She was excited to see monsters in real life, while also a little terrified.

Both monsters looked at Malenia and got on their knees. The Rank 9 Goblin couldn't talk, but the Rank 6 vampire was able to talk, so he greeted Malenia.

"This subordinate awaits the mistress's order." said the handsome vampire with black hair, pale white skin, and a powerful aura around him. His voice was filled with a subservient tone.

Malenia was surprised to see the monsters; she didn't think one of the monsters could talk with her and would be this handsome.

"System, can you hear me? Can others see you too like I do? And is it normal for monsters to talk like this? Also, they are loyal to me, right? They won't betray me because I'm weaker than them, right?" Malenia asked the system in her mind.

[Yes, Mistress, you can talk to me with your thoughts. And for your first question, no, no one can see me besides you. And as for your other questions, yes, they are 100% loyal to you. So don't worry and use them to deal with those adventurers.]

"Nice, now Dante and Goblin, go and deal with the adventurers." Malenia ordered the two monsters and started lighting up the dungeon master room she was in with crystal lights and other necessary items.

—————

Adventurers' POV

"Oh man, Rave, why did you call all of us when it's just an F-rank dungeon, and there aren't any monsters or crystal lights here? So its master is probably a low-ranking monster like a goblin." complained a short, ugly man to the team leader—Rave.

"Hitler, I already told you that dungeons are dangerous. You shouldn't take even an F-rank dungeon lightly. It may be a new dungeon, but a dungeon is still a dungeon, so we have to be prepared for anything." warned Rave, the team leader and an E-rank adventurer.

"Whatever. Guys, stop yapping and let's clear this dungeon fast. I want to go home and tak—"

"Shhhhhhh..." Rave silenced Lamai as he felt something was wrong with the sudden change in the dungeon's aura. The other three adventurers also got into position, trusting that Rave must have felt something, as he's the strongest in the team.

They prepared for a sneak attack, but the team heard footsteps and looked in the direction ahead. There stood a four-foot-tall goblin alone, holding a knife.

"What? It's just a low-rank goblin, Rave, hahaha, why are you acting so serious for this little shit?" Hitler laughed nervously.

Slice—squish!

Before Rave could reply, two heads went flying into the air. No one noticed how or when it happened. Rave and Hitler froze in fear, terrified by the thing that just killed two members of their team. They couldn't utter a single word, standing motionless.

After several seconds, Hitler couldn't bear it and started running towards the dungeon exit, screaming, "Sorry, Rave! My sister is ill, I need to take care of her, I can't afford to die!"

Hitler was almost at the exit, relieved at the thought of surviving the encounter with the unseen monster. But it was wishful thinking; his head rolled, painting a weird-ass painting on the dungeon wall with his blood.

"Tch, weaklings." Dante finally said after killing the three adventurers, revealing himself to the last remaining adventurer.

'A high-ranking vampire!! What is a monster like that doing in an F-rank new dungeon like this? How can I be so unlucky? I've already been cheated on by that bitch this year, and now this.' Rave thought, blaming himself for his misfortune.

"W-why is a high-ranking monster like you in this F-rank dungeon?" Rave asked Dante.

"Why do you ask? It's because my beautiful mistress is the owner of this dungeon. Weaklings like you daring to enter this dungeon baffles me. How ignorant you trash humans are." taunted Dante.

'What the fuck, this monster isn't even the master?? If he's this strong, then what about his master? Uhh, what have I gotten myself into? This is probably where I die. Why did I even come to this dungeon? Fuck, fuck, fuck, my life and luck.' Rave regretted coming to this dungeon more than anything.

"Anyways, time to finish my task." Dante muttered.

"STOP!!"

10 minutes ago—

Malenia was shopping for the necessary things to live in from the system shop; almost all items were magical, so she was excited to buy many things.

While she was going through the system shop, she asked the system about the situation between her monsters and the adventurers.

[Mistress, three of the adventurers are already dead. Don't worry, Dante is very powerful; he's just playing with them.]

"What!?? Dead? Why did he kill them? I just told him to deal with them, like drive them away from the dungeon or capture them." Malenia was shocked as she started running towards the entrance area of the dungeon.

[Mistress, this is normal; you have to kill them to survive, or they will kill you and take the dungeon core. And also, killing will increase the power of the dungeon and the level of the dungeon slowly.]

"That—but still, killing is too extreme." For Malenia, the concept of killing was abnormal; she had never thought of killing anyone in her life, even if it was her bastard husband.

As she approached the fighting area, she witnessed two bodies with their heads gone and red blood everywhere.

"Blarghhhhhh!" Malenia vomited at the gruesome scene.

[Mistress, if you can't handle this, you should add more stat points in mental strength.]

'Then add all points to the mental stat.' Malenia added all her remaining stats to her mental strength, and she calmed down a little.

She saw that Dante was about to kill the last one, so she told him to stop.

Back to the present

[Mistress, I advise you not to let anyone leave this dungeon alive. If they escape and tell others about this dungeon, more and more powerful adventurers will come to clear it.]

"Uhh but killi-oh, I don't need to kill him if he won't escape, right? Then just capture him, and I can also get more knowledge and information about this world."

"Dante, knock him out and tie him with something so he can't escape." Malenia ordered.

[But, Mistress, to level up this dungeon and become powerful, you have to kill people, as more people will keep coming to take the dungeon core.]

"Is there no other way to level up? There must be, right?" Malenia asked.

[Well, Mistress, there are different ways. It should be coming at any moment.]