After becoming a half dragon, it looks like Lucas also got a new title. He ranked up from low 4 star level to peak 4 star level and unlocked a new skill called [Dragon's Pride] and his first skill [Monarch of Chaos] evolved.
[Dragon's Pride]: Dragons are colossal mythical creatures that wreak havoc on anyone they deem their enemy. Their pride is so immense that it won't allow mere parlour tricks to affect their minds. The user is immune to all types of mental attacks.
"So, a passive skill, huh? This is incredible, though, to be immune to mental attacks," Lucas remarked.
Deciding to head back towards the boss room, Luna, instead of walking, decided to jump on top of Lucas's head and lay comfortably in his hair with her eyes closed.
It felt quite amusing to see her, being a mighty dragon in the form of a majestic cat, resting atop a 12-year-old boy's head.
Lucas thought as he started walking back towards the boss room.
After 20 minutes of walking, he finally arrived, yet there was still no gate to send him back.
He could either go back all the way from where he came when he defeated the D-rank king predator, or find the reason why the gate isn't showing up or how the boss of this dungeon died.
As he was thinking while gazing at the throne, something interrupted his thoughts.
"Kekeke, took you long enough, you know?" a sinister voice behind him said, making his hair stand on end.
In front of him stood a 2-meter-tall demon with dark skin, long legs and arms with sharp nails, two bat-like wings on its back, pure black eyes, and a sinister smile on its dark face, as miasma poured out of its body.
"You know how long I was waiting for someone to arrive at this dungeon? I got so bored I decided to explore the dungeon and fell asleep. But, to my surprise, the moment I fell asleep, a noble adventurer decided to solo this dungeon and managed to defeat the pup I sent at the entrance gate of this dungeon, kekekeke."
"Not only that, you even managed to enter the hidden room which I was desperately trying to enter. Yet, whenever I tried to enter, some hidden force kept blocking my path. Say, what did you find in there? What did that ancient king hide?" the sinister demon bombarded Lucas with questions.
The demon's rambling was cut off as he gazed at Lucas, who had a grin on his face and his eyes locked onto the demon. The demon felt as if he were being watched by a predator, and a chill ran down his spine for a second before he felt back to normal.
'What was that feeling for a second? Have I been eating too many humans that I became drunk?'
"Hey," the white-haired boy with blood-red eyes and verticle pupils, who wore a mask that had multiple protective spells on it to prevent the demon seeing through it and was hiding his face, interrupted.
"Did you kill the boss of this dungeon?" Lucas asked curiously.
"Kekeke, I did, yes. So, what of it?" the demon replied.
"Nothing. I was just curious why there isn't a gate that appeared when you defeated the boss," Lucas continued.
"Oh, that. Keke. That's because I used an artifact to delay the gate from interfering."
'Artifact, huh? To think the demons would have something so incredible to interfere with space.'
"I see... So why are you actually here? In a lowly C-rank dungeon?" Lucas inquired further.
"Kekeke. How bold of you to keep asking questions. But, I'll amuse you. You know damn well why I am here. This ancient king was said to be someone who could rival his majesty back in the day! Isn't that absurd? I know, right? Well, anyway, it was said by his majesty that this king possessed something extremely valuable but was lost in time and ended up in a dungeon for some reason unknown. I searched for more than 100 years for this throne room, and when I finally found it, I saw a secret room where his most valuable item must have been, yet I can't enter it! Isn't that annoying!?"
"Not as annoying as you are," Lucas retorted after getting all the answers he needed, positioning himself to fight.
"Huh? What did you say? You piece of shit!?" Z'riel exclaimed, clearly enraged.
"Didn't you hear me? Don't tell me you're fucking deaf as well as being annoying?" Lucas continued, further provoking the demon and aggravating him even more.
"YOU DARE CALL ME ANNOYING!? ME!? Z'RIEL, THE SON OF BELPHEGOR!"
"I have no fucking idea who that is, and I don't care either," Lucas replied dismissively.
******
'I don't understand why why why ... Why is he insulting me!? Doesn't he know I am a demon!? Every time a human sees me, they start squealing like pigs and despair! Originally, I thought the human was just good at hiding his despair and was asking questions to stall for time, maybe hoping someone would rescue him! But instead, he dared to INSULT ME! WHO DOES HE THINK HE IS!?'
"I WILL SHRED YOU LIMB TO LIMB, YOU FUCKING WEAK HUMAN!" Z'riel roared, consumed by anger. He couldn't believe that a lowly human would insult him. His pride was wounded, and he vowed to make the human suffer, tearing him apart slowly limb to limb as he begged for mercy. Only then would Z'riel be able to heal his damaged pride.
"Weak? Hahaha, not only are you deaf and annoying, but also blind!" The boy taunted, further enraging Z'riel.
'WHY WHY WHY WHY WHY WHY WHY!? WHY WAS HE INSULTING ME EVEN MORE!?'
Z'riel couldn't understand it. He could tell that this human was weaker; he was probably a high to peak 4-star level, while he was a mid 5-star level. So why was he so confident?
Suddenly, he heard a voice whisper behind his ear, a voice that made his body shudder as if the devil was whispering to him.
"What are you thinking so deeply about?"
Before he could react, he felt something hit his abdomen with incredible speed and strength, launching him towards the other side of the boss room and crashing directly against the wall, making him vomit black blood.
"BLERGH!"
As he fell to the ground, he tried to regain his footing, but he was still not stable. He glared at the human standing where he was before, seeing him grin at him.
"Oooh? Didn't you say I was weak? What happened? Don't tell me you're spitting out blood because of someone as weak as me just because I punched you? Doesn't that make you even weaker than me? Hahahaha!" Lucas taunted, with the black cat still sound asleep, as if all of this had nothing to do with it.
*********
'Just an ordinary punch did this much damage?' Lucas thought as he looked at the demon, who was gazing at him as if he wanted to destroy every part of him.
'It still is a demon, so I should take it more seriously.'
As he said that, he quickly pulled out his Blade of Chaos from his [inventory].
Grasping the sword with one hand, he got into position, and as both he and the demon, who had both arms open wide next to him, using his long nails as weapons, bent their knees, they both disappeared from their spots and reappeared in front of each other. Lucas's sword clashed with Z'riel's claws.
Clanck
Both kept parrying and blocking each other's strikes, destroying the throne room further. The only thing that remained intact was the throne itself, seemingly indestructible, with a black majestic cat laying on it, gazing at the fight with curiosity and sparkling red eyes.
As they continued to fight, the demon would sometimes back off to catch his breath, and Lucas would use spells like lightning javelin or fireball to prevent that from happening.
'HOW IS HE NOT TIRED!? IS HE REALLY HUMAN!? AND WHY IS HE A MASTER OF BOTH THE SWORD AND MAGIC!?' Z'riel was baffled by the white-haired boy who could keep up with him so easily and effortlessly use both swordplay and magic.
'I must inform his majesty about this quickly! If he grows even more, he might become a hindrance to his plans in the future!' Z'riel thought while clashing with Lucas's blade and evading his spells.
Lucas was still not tired. Now that he had become a half dragon, his mana quantity had increased significantly, as had his stamina. He could easily go on like this for hours. But he started to notice the demon pulling back little by little and watching around as if trying to find a way to escape.
'I should end this quickly. I can't let him escape,' Lucas thought.
As they slid back a few meters, Lucas didn't use any spells this time. Z'riel thought that he must have finally run out of mana and decided to plan his escape.
"You are a strong human boy! You have a lot of potential. Why don't you join us demons? There wouldn't be a better honor than serving his majesty—"
Before he could finish his proposal, trying to fool the human, he felt a tremendous pressure on his shoulder, making the floor underneath his feet crack. Though he didn't kneel, the pressure was suffocating.
Gazing at the source of the pressure, his entire body shuddered. He saw a colossal dragon with white scales as snow and blood-red eyes—the incarnation of chaos.
"A-ah."
He fell to his knees, feeling true fear for the first time in decades.
'Why? His majesty said that all dragons perished thousands of years ago!? Why is someone like that here!?'
"W-who are you really!?" He managed to squeak out of his dry throat.
But before he could get an answer, he saw a beam of red and black energy heading straight towards him, destroying everything in its path.
His brain screamed to dodge, telling him that a single hit would kill him. But he couldn't move out of primal fear.
He heard the monster's response before the beam of chaos finally hit him, ending his life once and for all.
"Lucas Nightstar."
The one who defeated the demon, Z'riel, son of Belphegor.