Chapter 8: The Practical Class of Adventure
The Cost of Peace
After the terrifying necromancy class—where I was outed as the potential commander of an unkillable, telepathic bone army—I was desperate to release my accumulated stress and anxiety. I had so many new problems to solve, but at least the biggest, noisiest problem was temporarily silenced.
I had effectively paid a ransom to my own mind. My spiritual domain now contained an entire virtual lounge. I was constantly streaming media to the two chaotic entities bound to my soul: the Intelligent Fairy Loan and Excalibur Karma Calvary Road.
I am eating the cost, I thought, mentally calculating the damage. I had already provided a massive digital library—over 8,000 manga, 17,000 light novels, and 30,000 manhwa—just to keep the two idiots in my head occupied.
"Oh, I almost forgot," I muttered to myself, walking home. "Maybe I need to create a spirit gaming laptop and a games console in my spiritual domain, too."
I envisioned the new equipment, knowing the mana cost would be a rounding error compared to my Triple Infinity reserves. If I provide them with the ultimate form of escapism, maybe that's going to let me survive with those two idiots in my head, I concluded, making a mental plan to craft the ultimate virtual gaming setup. My life had become a delicate balancing act of internal media management.
The Fantasy Romance Collision
The next morning, en route to school, I was so preoccupied with planning the internal architecture of my virtual server farm that I failed to look where I was going.
I bumped hard into someone right in front of me.
"O-oops," I stammered, rubbing my shoulder. I looked up and saw, standing there, a figure of striking beauty. Wow, this man is so handsome! He had long, flowing blue hair, the color of water reflecting a perfect sky, and an easy, dazzling smile.
Beside him stood a beautiful girl. Her eyes were like fire crystals in a sunset, sharp and intense, and her hair was a mix of blood-red and purple. They looked like they had stepped right out of a high-budget fantasy romance anime.
"Oops," said the handsome man, chuckling softly. "Sorry, kid. You must be careful with that big mind in your head. If you're careless enough, you'll make a bumping with an elder dragon one day, just like that."
"Sorry! Sorry! Sorry, Mr.!" I apologized profusely, my worry face immediately returning. I can't believe I just bumped into the male and female leads of a beautiful shoujo manga!
The beautiful girl giggled softly. "Oh, my god, you are so cute! Now, now, dear, look at the time. We must keep going. Sorry, kid! Have fun!"
I watched them go, completely star-struck. "Wow," I said to myself, "you both look like a fantasy romance manga I read in my past life."
Before they rounded the corner, I noticed the heavy silver chains around their necks. Dangling from the chains was a metallic badge with a single, shining Gold symbol. It was the sign of an adventurer, but the insignia was complicated. "S+ Rank."
"Ah," I said to myself. "Those are some high-level adventurers, I guess." Just normal, unbelievably beautiful, S+ Rank adventurers. Nothing to worry about.
The Practical Lesson
I arrived in the S-Classroom, still buzzing from the strange encounter, and took my seat. My King Undead Bone, my efficient little tea server, was already standing beside me, holding a fresh glass of Lemonade Butter.
The teacher announced the day's curriculum: The Practical Class of Adventure.
"Students," the professor declared, beaming. "For today's practical lesson, we have invited two special instructors who will be explaining the intricacies of dungeon diving and monster hunting."
The classroom door opened again.
And in walked the Fantasy Romance Couple from the street.
I stared, completely surprised. They stared back, equally shocked.
"You kid!" the handsome man exclaimed, pointing at me. "You're in the S-Class Special Division, kid?"
"Yeah," I replied weakly.
The pretty girl smiled widely. "Oh, I see! So you must be strong!"
The professor clapped his hands to restore order. "Sorry, gentlemen and lady, should we start the class?"
The two S+ adventurers stepped forward.
The blue-haired adventurer introduced himself first: Alan Frost.
The girl introduced herself with a cool, confident smile: Lina Verlin.
Then, Jenny—who had been silently watching the entire exchange—leapt up from her seat, her eyes wide with shock.
"No! Why?" she practically shouted. "You two are the most strongest adventurers in the Three Kingdoms! The Ice Berserker and the Blood Witch!"
A stunned silence fell over the classroom. Everyone was surprised to hear that.
My entire body went rigid. I was sweating profusely. I looked down at my King Undead Bone, which was patiently holding my Lemonade Butter.
Ice Berserker. Blood Witch. S+ Rank. Strongest in Three Kingdoms.
I was absolutely shocked and scared.
I spoke to myself, my voice a barely audible, internal wail of pure misery.
"Why... why is it always me? Why do I always keep meeting with non-normal people in this world?" I asked the cosmos, the spirit of Excalibur Karma cheering a fictional battle in my head.
I had managed to create internal peace only to collide head-first with external chaos. I put my head on my desk and started silently crying again.
What is the first, most dangerous question Alan Frost or Lina Verlin will ask Leon about the practicalities of dungeon diving?
Chapter 8: The Practical Class of Adventure (Continued)
The Unwanted Gaze
As Jenny dramatically announced the legendary titles of our instructors—Alan Frost, The Ice Berserker, and Lina Verlin, The Blood Witch—I wanted nothing more than to melt through the floor.
Alan, the ridiculously handsome S+ adventurer, waved his eyes across the room and, naturally, his gaze smiled directly at me.
Not Alan! I pleaded internally. Please, don't make the attention fall full on me! I just want to sit here and enjoy my Lemonade Butter served by my unkillable butler minion!
Alan's attention immediately set off the internal alarms of my rivals. Jenny leaned forward, her eyes narrowing with suspicion, clearly wondering why the strongest adventurer in the Three Kingdoms was focusing on her Gentle Giant. Christopher was still staring at me, though he'd switched from nose-bleed trauma to deep, analytical thought. Lucy continued to stoically eat her lollipop, utterly detached, while Mariana—whose aunt was currently standing on the stage—was still thinking about my King Undead Bone tea server with a possessive gleam.
The S-Rank Dungeon Mandate
Alan took center stage, the air around him becoming cool and refreshing—a testament to his Ice Berserker title.
"Alright, S-Class," Alan said, his voice calm but holding the weight of experience. "Let's talk about the practical application of your skills. We've been requested by the Headmaster to take you through a high-level field experience."
Lina, her voice sharp and eager, continued the explanation. "Specifically, a calculated S-Rank Dungeon. This is a very dangerous matter."
Alan picked up the thread. "The standard S-Rank Dungeon we are using costs lives to clear, even for high A-Rank parties. Every regular monster in that dungeon is rated A+, and the very low-rank monsters are only A-Rank. It has a very deep floor structure—around 70 floors—full of escalating A+ and S+ monsters."
He then delivered the final, terrifying mandate with a cheerful smile. "The Headmaster requested that we have you all go into the dungeon with our guidance. It's time to test that S-Class strength!"
The entire classroom exploded with various reactions.
"YESSSSS!!!!" Jenny shouted, leaping out of her seat, her eyes shining with manic excitement. "That's what I'm talking about! Finally, a real fight!"
I was instantly full of sweat just to hear Jenny getting so fired up. This is not a vacation! This is a forced death march!
I looked at Lucy. She was still stoic, still enjoying her lollipop, and didn't care a thing about the announcement. That girl is too cold for this world, I thought, envying her sheer apathy toward danger.
I then looked at Christopher. The scholar opened his magic box and began taking out three strange, complex boxes: one glowing blue, one shimmering green, and one pulsating red. He wasn't scared; he was prepping complex support gear.
Mariana didn't use a box. She began a dark, complex spell, the air around her desk growing heavy. She's not bringing gear; she's summoning a large external mount. A colossal, winged shadow began to form behind her—she was summoning an Undead Wyvern to go into the dungeon.
The Forced Enthusiasm
Alan clapped his hands, his smile infectious. "Okay, guys! We leave in one hour! Get ready! Let's go!"
"YEEAAAHHHHH!" the entire S-Class—Jenny, Christopher, Mariana, and even some of the background students—roared with genuine eagerness.
Except for me.
I knew that a single Triple Infinity Mana spell would obliterate the entire 70-floor dungeon, leading to an Elder Dragon collision and another accidental world-saving event. I knew I had to maintain my facade of a strong, but not cosmic, hero.
Everyone looked at me, waiting for my powerful affirmation. I forced my panic down, desperately trying to appear calm and overthinking the combat strategy.
I opened my mouth and forced the words out, trying hard to make it sound serious and ready.
"Y-Yeeeaaahh," I managed, the word coming out in a very slow, drawn-out tone. My internal self was weeping, while my external self tried to look like a stoic protagonist contemplating the existential threat of an S-Rank dungeon.
I just want to stay here and watch the rest of the historical documentary with Karma! I screamed internally, as I stood up, forced to follow my chaotic classmates and two legendary adventurers into the maw of an S-Rank dungeon.
The Kindergarten Yakuza Fight
The descent into the S-Rank dungeon, from the first floor until the 40th floor, was not a structured military campaign; it was a pure, unadulterated disaster.
"This is chaos," I muttered to myself, ducking behind a pillar of rough stone while my King Undead Bone silently maintained my Lemonade Butter. "I swear, this looks exactly like a fight scene from a Yakuza film, except all the combatants are ten years old in a kindergarten cafeteria brawl."
There was no strategy, no war signaling, and zero coordination. It was a testimony to brute-force chaos.
Christopher had already been burned by several stray fire spells and was running for his life, screaming like it was the end of the world. He kept casting defensive barriers, only to have them shattered by the pure, accidental force of his own teammates.
My sister, Lucy, was fighting like she thought she was the MC of this entire episode. She moved with ruthless, cold efficiency, treating the powerful A+ monsters like training dummies, completely indifferent to the chaos around her.
Mariana was screaming instructions at her Undead Wyvern, which kept getting the targeting wrong. Instead of hitting the monstrous Earth Golem, the Wyvern's concentrated blast of black fire arced across the chamber and burned Christopher's expensive hat again.
Jenny was a blur of electric-blue lightning and raw aggression. She was kicking and punching an armored Zombie Bear, but because she was so focused on brute force, the monster managed to bite her head. She didn't seem hurt, just annoyed, as she ripped the zombie bear off her scalp and punted it through a wall.
I watched this horrifying ballet of power and idiocy, my mouth slack. "What the hell am I just looking at?" I whispered.
It felt like a terrifying flashback to my first few days in this world—meeting the Five Idiots who cursed me with infinite power, Kaelen's silent perfection, Lucy's terrifying strength. Oh, my goodness. What am I supposed to do with this second life? I asked myself, already knowing the answer was "suffer."
The Instructors' Indifference
I looked over at our esteemed S+ Rank Adventurers.
Alan Frost was leaning against a wall, completely relaxed. He pulled out a flask and took a long drink. His eyes were glazed over, revealing a distinctly drunken side.
I slapped my head again. The Ice Berserker is drunk! He's literally leaning on a wall and watching the S-Class destroy themselves!
Lina Verlin, the Blood Witch, was trying to give the students orders, but they had no effect at all. Lina didn't seem bothered, though. She just laughed and watched the spectacle, clearly having fun.
I stared at them with a look of utter, stupid reaction.
This was not the cold, calculated sense of a fantasy fight I had hoped to experience as a background character. This was a clown circus doing stupid things to make people laugh.
"Oh, my god," I groaned. The chaos was infectious, and if I didn't step in, Christopher would surely die, Mariana would accidentally summon a plague, and Jenny would eat a monster.
I had to stop the chaos. I had to use a cheat skill to impose order, which meant I was about to ruin my quiet life again.
What ridiculously simple action should Leon take that instantly stops the chaos and forces everyone to look at him?
The Overfed Fairy Consultant
I needed a solution. I needed to impose order before Christopher was permanently immolated and Jenny contracted rabies from an A+ monster. I had to use a cheat skill, but I was out of ideas.
Suddenly, a golden glow shimmered in my vision, and the Intelligent Fairy Loan sprite materialized—not in my mind, but right in front of my face, physically popping out of my consciousness.
But it looked... different.
"What the hell are you eating in my spiritual mind that made you so fat, Fairy?" I asked, completely aghast. The tiny sprite was visibly rounder, clutching a large bag of spectral potato chips and trying to hold a smartphone at the same time.
The Fairy paused, crunching loudly. "Hi, Master. You're so mean, you know that? Do you forget you made a spirit free refrigerator and 80 junk food types to keep us two quiet in your spirit mind?"
I thought back to my desperate bribe. Oh, sorry, I forgot, Fairy. My desperation for peace had inadvertently caused a cosmic health crisis.
The Fairy slapped its pudgy forehead with a free hand. "Okay, never mind! Just hear me, Master! I've been researching the chaos!"
The Fairy—the literal repository of Absolute Knowledge—leaned in, sounding exactly like a couch-bound strategy gamer. "If I were you, I would use your Blood Crush Affinity and mix it with that Undead King Bone mana. Make a monster that screams too loud to be ignored and stop them."
That was a great idea. A perfectly loud, shocking, temporary distraction using a unique mixed-affinity servant.
"That was a great idea, Fairy! Thank you!"
"You're welcome, Master." The Fairy gave a lazy wave and vanished back into my spiritual domain, immediately sticking its phone to its ear and recommencing its chip consumption.
The Screaming Blood Servant
I looked at my hand, shaking my head. Maybe I went a little too far for those two. I don't want them to get a junk food habit. I slapped my own face. My life was now managing the digital addiction and nutritional status of my most powerful cheat skills.
Shaking off the absurd internal distraction, I focused on the chaotic battlefield.
I channeled a massive burst of my Triple Infinity Mana, focusing the Shadow Affinity through my Undead King Bone to create a skeleton, and then injecting the raw, aggressive power of my Scarlet Blood Crush Affinity into the structure.
A brand-new entity solidified instantly in the center of the dungeon floor, exactly where Jenny and the others were fighting. It was taller than any of them, a gaunt, blood-red skeleton with razor-sharp claws, dripping with shadows, but its purpose was singular: A Loud Noise.
I gave the simple command: "Scream."
The Blood-Crush Undead Herald opened its jaw and emitted a noise that did not just pierce the air—it pierced reality. It was a high-pitched, echoing, raw sound of primordial terror, enhanced by my cosmic mana.
The A+ Monsters immediately staggered, clutching their heads, their focus shattered.
Jenny froze mid-punch, dropping the Zombie Bear she was about to throw.
Lucy stopped eating her lollipop and looked at the new creature with the first sign of curiosity I had seen all day.
Mariana's Undead Wyvern shrieked in pain, momentarily distracted from burning Christopher.
Christopher stopped running and fell to his knees, his hands covering his ears, which were already bleeding from the sound.
Total silence, save for the horrifying, echoing wail of the Blood-Crush Undead Herald.
Alan Frost spat out his drink, dropping his flask. Lina Verlin stopped laughing, her fire-crystal eyes widening in shock.
I had done it. I had imposed order. And I had done it by creating yet another unique, monstrous, impossible cheat-servant in front of two S+ Adventurers.
I am never going to find peace, I concluded, as every single eye in the dungeon turned and fixed on me.
Leon's Tactical Analysis
The horrifying wail of the Blood-Crush Undead Herald had shattered the battlefield. Total silence reigned, save for the rhythmic dripping of ichor and the faint, internal sound of Excalibur Karma reviewing an anime opening sequence. Every eye—monster and human—was fixed on me.
I took the opportunity, using the universal silence to impose my will, stepping forward from behind my perfect, unkillable tea server.
"Look, guys! You hear me?" I declared, my voice low but cutting through the silence, channeling my former life's strategic mind. I pointed to the dungeon environment, which was strangely identical to the floor we had cleared an hour ago. "Have you understood that we are just stuck in this loop at floor 40, with no progress forward? We've been repeating the same three rooms for the last hour! That must mean something is wrong!"
My analysis was simple, but it was the first piece of non-chaotic reasoning anyone had offered.
Lina Verlin, the Blood Witch, snapped out of her shock. Her eyes, still wide, finally focused. "Yes! Now I get it!"
Recognizing the tactical error, she immediately began chanting a complex spell, her hand cutting the air. "The blood flowing through my veins, hear me, oh wise Scarlet King! Bring me a spell not to devour light, but present to me the path that I need to see! Casting Blood Magic: Almighty Sight!"
A surge of red mana pulsed from Lina, adhering to the dungeon wall. The spell didn't just illuminate the stone; it peeled back a layer of perception, revealing a shimmering, heat-distorted overlay—a massive, cunning illusion.
The wall, which seemed like solid rock, was exposed as the edge of the illusion.
Jenny, seeing the shimmering barrier and driven purely by instinct, roared and instantly smashed through it with a single, devastating, lightning-charged punch.
The SSS+ Threat
The illusion shattered like glass. The true 40th floor was revealed: not a simple tunnel, but a colossal, cavernous lake chamber. And floating directly over the black, murky water was a monstrous entity that dwarfed the S-Class students and the instructors alike.
It was a creature of immense, beautiful terror: the Water Dragon Lord. Its scales shimmered with compressed blue mana, and its eyes glowed with ancient malice.
The real fight began instantly.
Lina dropped her arm, her entire body trembling as she looked at the Dragon Lord. Her shock was palpable, her voice cracking with terror. "No... Why?" she whispered. "This monster is not supposed to come from this dungeon! This is a creature from an SSS+ Dungeon! Why is it here?!"
The sheer, overwhelming power radiating from the Dragon Lord silenced even the newly awakened Excalibur Karma, whose voice was temporarily muffled by the sheer weight of the threat.
The fight was instantly serious. The S-Class students snapped into high alert, recognizing a threat far beyond their training scope.
Jenny's lightning flared, instantly pushing her to max power.
Mariana commanded her Undead Wyvern to shield the group.
Christopher threw his support boxes open, complex barriers already forming around his allies.
I knew my normal debuff spells wouldn't touch this thing. Only my highest-level cheat skills had any hope of making a difference, and I had to use them subtly.
The Water Dragon Lord opened its maw, charging a devastating, world-shaking blast of hydro-mana.
I threw the glass of Lemonade Butter onto the King Undead Bone (who caught it perfectly, even with the sudden motion). I stepped forward, channeling the absolute maximum power I dared show.
"Get ready, everyone!" I yelled, my voice ringing with an authority I didn't feel.
Simultaneously, Alan Frost finally activated his power. His easy smile vanished, his blue hair crackled with frost, and his eyes glowed a furious, bloody red as he transitioned into his terrifying Ice Berserker Form, prepared to sacrifice himself to buy time.
My turn. I needed a debuff that looked simple but had a cosmic effect.
What ridiculously subtle, Triple Infinity Mana debuff does Leon cast that targets the SSS+ Dragon Lord, making it easier for his comrades to fight?
The Battle Devil's Debuff
The Water Dragon Lord was charging its devastating hydro-blast. Alan Frost had shifted into his sacrificial Ice Berserker Form. It was the moment of truth.
Before the dragon could unleash its roar, I channeled the only power I had that was both defensive and relatively subtle: a Triple Infinity Mana application of my life-affinity skill.
"Nature Life Absorption!" I shouted, activating the debuff.
A wave of shimmering, chaotic life-force energy—part ethereal green, part deep scarlet—flared outward from my body, washing over the SSS+ Dragon Lord. I had intended for this ability to reduce the damage attack by 50\%, making the blast survivable for the S-Class students.
But the Dragon Lord was too strong. Its SSS+ status resisted the cosmic-grade debuff; the effect was heavily diminished. The skill could only manage to reduce the damage by 15\%.
The Dragon Lord roared, unleashing a world-shaking torrent of hyper-pressurized water.
The resulting blast was still catastrophic, shattering the remaining dungeon walls and sending torrents of water and debris everywhere. However, due to the 15\% debuff and the frantic defenses of Christopher and Alan, everyone survived the blast. They were battered, bruised, and soaking wet, but alive.
The Worst Scenario
The moment the smoke cleared, the mood was one of utter devastation. Everyone was shaking. They had just faced a creature beyond their comprehension, and they had barely survived. Jenny was trembling, her lightning flickering weakly. Lina and Alan looked grim, realizing they were facing a force they couldn't possibly defeat alone.
Everyone was scared and had completely lost their fighting spirit.
But that wasn't the worst scenario.
The worst scenario was my reaction. The adrenaline from the near-death experience, the rush of channeling my true, cosmic mana, and the inherent thrill of my past life's martial instincts took over.
My heart began pumping with a terrifying, rhythmic intensity. The deep-seated, terrifying part of my soul that was cursed with infinite fighting prowess smiled.
It wasn't a kind smile. It was a wide, predatory, utterly insane smile—the smile of a true Battle Junkie. My face, which moments ago was pale with fear, now looked utterly scary. The trembling MC had vanished, replaced by a Battle Devil himself.
In the distant school hospital, Kaelen, my Butler, suddenly clutched his chest. Even hundreds of miles away, the Demi-Cosmic Deity could feel the monstrous, unrestrained Battle Aura I was leaking. He looked terrified.
I raised my hand, the chaotic energy of my Thunder, Shadow, and Chaos affinities coalescing perfectly. A dense, crackling, terrifying sphere of purple-black energy, looking exactly like a twisted, corrupted lightning ball—a Black Chidori—formed in my palm.
"This is it, guys," I said, my voice low and filled with chilling excitement.
Jenny looked at me, her face pale with a mix of awe and primal fear. She saw the torrential power and the insane grin. It felt to her, and everyone else, like a moment of raining hell. They were terrified with my smile.
I had saved them from the blast, only to reveal myself as the most terrifying thing in the room.
My God! I smiled! I screamed internally, instantly snapping out of the battle trance and returning to my default state of despair. I didn't mean to smile like that! Now they think I'm a psycho!
The Unstoppable Blur
I couldn't control my excitement. The Black Chidori crackled in my hand, reflecting the terrifying, primal smile plastered on my face. My years of martial arts mastery and infinite mana had broken through my despair, turning me into a creature purely dedicated to the fight. I laughed—a genuine, unhinged, battle-mad laugh—and instantly slashed toward the Water Dragon Lord.
The moment I performed this simple, forward movement, it was no longer normal; it was a speed that defied logic. In the space of one second, I moved and struck 300 times. I was a phantom, an echoing blur of raw energy slashing across the Dragon Lord's massive body.
The Dragon Lord, an SSS+ creature that commanded the elements, couldn't even register my attacks. Its majestic blue scales, which resisted the full might of Alan and Lina's power, were being shredded.
Jenny, still stunned and terrified, felt her immense pride crumble. She whispered to herself, "If this man were to seriously fight with me—with all my training spanning 800 years—I could never defeat him at this level. He is already standing at the peak of martial perfection."
Alan Frost, the Ice Berserker, watched his own sacrifice become unnecessary. He dropped his guard, his red eyes wide with awe and confusion. "This kid is not a monster. He is a God user a human body!"
Lucy, my stoic, overpowered sister, finally showed emotion. A single tear traced a path down her cheek, and her voice trembled. "I have never seen this type of swordsman in my life." It was the ultimate, terrifying compliment from the silent assassin.
Christopher Silkream, the scholar, was hyperventilating, struggling to compute the impossible reality. "Oh my god! I thought of you as a very genius person, but this time, you have changed time itself! You moved so fast, you changed the flow of the millisecond! You are like a non-human I have ever seen!"
Mariana, the Blood Witch's niece, was the first to understand the implication of my power. Her dark aura pulsed with possessive reverence. "Death is not an option for you, right, Leon? You treat it like a plaything."
The Epilogue of Chaos
As the last strike—the Black Chidori—crashed into the Dragon Lord's neck, the entire class, including the two veteran S+ adventurers, shouted the same title, the same conclusion, in unison:
"YOU ARE NOT LEON ANYMORE! YOU ARE THE BATTLE DEVIL HIMSELF!!!!"
I struck the final blow with a triumphant laugh of pure enjoyment.
The Dragon Lord's head was severed just like cutting through butter. The massive SSS+ creature, which should have required a coalition of kingdoms to defeat, collapsed into the murky water with a sound like a small earthquake.
The battle had ended in six minutes—five minutes and fifty seconds of which were Leon's frenzied, unstoppable assault.
I stood there, breathing heavily, the monstrous energy receding as quickly as it had erupted. The smile vanished, replaced instantly by the familiar, horrified look of exhausted despair.
I looked at the annihilated SSS+ monster, the stunned, terrified faces of my classmates, and the two bewildered S+ instructors.
I just wanted a quiet practical class, I wailed internally. And now I'm the Battle Devil who can stop time and slaughter divine beasts in six minutes. I pinched the bridge of my nose, utterly defeated.
The silence that followed was broken only by the faint, muffled sound of Excalibur Karma Calvary Road cheering for my high score from his virtual lounge.
What ridiculous consequence will Leon face now that Alan Frost and Lina Verlin have witnessed his true, uncontained power?