The Adventurers' Association system utilizes the Oracle, which means as long as I abide by the law, I can register anonymously and create a false identity. I wear black armor from head to toe to remain incognito. My affinity with darkness allows me to move with agility and hide in the shadows, becoming invisible to the eyes of enemies. Together with the other adventurers, we face the monsters of the F-rank dungeon.

Thanks to my strength and the magic enhanced by my C-rank affinity with darkness, I easily defeat the attacking monsters. My spells are more powerful and precise, and my control over darkness allows me to manipulate shadows and create devastating attacks.

After gaining enough experience, I decide to complete the dungeons on my own, without the help of a party. My confidence in my abilities is high, and I know I can face the challenges of the dungeon alone.

Moving through the shadows and utilizing my affinity with darkness, I confront the dungeon's monsters one by one. My skill in using the sword and magical powers is now unmatched, and I no longer need the support of other adventurers. My darkness spells prove to be a formidable weapon against the monsters, and I easily defeat enemies that were once a challenge. My reputation as a solo adventurer grows, and I become known as one of the strongest and most skilled explorers.

Exploring the dungeon alone allows me to further discover and refine my magical abilities. My affinity with darkness makes me a fearsome opponent, and I am getting closer and closer to achieving my goals as an adventurer.

I face every enemy with courage and determination, showing the world my strength and talent. My false identity and black armor protect me from suspicion and allow me to move through the dungeon unnoticed.

I find myself in the heart of an ancient ruined temple, having entered a rank F dungeon where mana is highly concentrated, and strange symbols adorn the walls. So far, I have encountered lizardmen, who are rank E monsters. Even with my dark magic-enhanced spells, I have been injured. I've used half of my mana potions and a couple of healing potions. Now, my concern is facing the boss monster without mana.

I finally reach the center of the temple, where a giant door with runic inscriptions awaits me. I have to confront a terrible boss monster: a gigantic lizardman.

The room is dark, illuminated only by the faint light of magic stones embedded in the walls. In the distance, I catch a glimpse of the imposing silhouette of the boss monster: a tall, muscular lizardman with dark scales glistening in the dim light.

Its green scales shimmer in the faint light of the temple, and its yellow eyes fixate on me with ancestral malevolence. I tightly grip my sword and focus my mana, preparing to face this terrifying creature.

Argenius stands by my side, ready to attack with its dark abilities. The monster stares at me with fiery yellow eyes, emitting a threatening roar.

I decide to initiate the attack, unleashing a chain of black mana towards the boss. The serpentine chains entangle its body, slowing its movements. Taking advantage of the situation, I launch an explosive mana sphere, causing it to stumble and trip.

But the boss doesn't go down easily. It quickly recovers and gives me a challenging glare. Drawing an enormous sword, shimmering with dark energy, it prepares to strike. I move nimbly, and Argenius attacks with its dark blade, attempting to distract the monster.

I manage to distance myself from the creature and begin to concentrate my mana for a powerful move. I create a wave of dark energy, surrounding myself with a mana armor to increase my defense. Then, I unleash mana arrows against the monster, repeatedly hitting and weakening it.

The boss proves to be resilient and charges at me with force. I manage to parry its attacks with my sword, but its strength is overwhelming. Argenius attacks it from behind, trying to distract it, but the monster remains focused on me.

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I decide to take a risk and unleash a powerful mana sphere towards the monster. The explosion hits it directly, shaking the cave. The monster staggers, but it keeps on fighting. I'm exhausted, but I can't give up now.

I decide to use my ace in the hole, the Terminator, an automatic rifle with firepower that can take down even a rank D monster. The monster's skin is tough, but I enhance the bullets with my dark mana. I keep flooding it with bullets, spending 250 dollars per shot. I hope it dies soon; otherwise, I'll go broke.

The monster is finally exhausted, but it hasn't said its last word. It charges once again. I hurl mana chains to immobilize it, and with the sword in hand, I deliver a powerful blow, cutting through its scales and gravely injuring it.

The monster falls to the ground, exhausted and defeated. The cave fills with silence, and Argenius and I catch our breath. We have won, but the battle was tough and exhausting.

I hope the treasure will make me regain the money I lost. After the battle, the cave echoes with our heavy breathing and the sparks of energy dispersing in the air. I'm proud of our success, but I know we must act quickly. The risk of other monsters or traps inside the dungeon is always present, and we must be ready to face them.

We navigate through dark corridors and mysterious rooms, confronting monsters and traps with agility and caution. The mana chains, arrows, and energy spheres prove to be valuable allies in our battles.

As we progress, our confidence grows, and the fear of danger fades away. We become more efficient in fighting together, anticipating each other's moves without even needing to speak.

After exploring deeply into the dungeon, we reach the treasure chamber. The place is illuminated by magical light, and a sparkling treasure awaits us. Gold coins, enchanted jewels, and ancient artifacts shine brightly in the light.

Among the various items I found, there is a magic sphere emitting a powerful magic aura. Despite my attempts to decipher its purpose using the system through the amethyst stone, I am unable to figure out what it is. After several tries, I give up.

Among the various artifacts, there is a subspace ring, which is the most valuable among all the items I have found. I could earn at least 1 million dollars by selling it to the highest bidder. However, I am not foolish enough to sell such a valuable item, and I won't sell the crystal sphere either until I discover its true nature.

[Congratulations! You are the first to complete the "Lost Time Temple" dungeon.] [You have obtained the title "Pioneer (Rare)" - Health +25]

I'm surprised to see the notification, but what's strange is that the system didn't say I was the first to find this dungeon but the first to complete it. This means that other adventurers have found this dungeon before, but they all died or managed to escape with a teleportation stone.

In just three months of constant and daily training, I have made great progress as an adventurer. Thanks to my determination and the power of my darkness magic, I have successfully completed 15 rank F dungeons alone.

Every day, I challenged stronger monsters and faced unpredictable dangers, but my skill in using darkness and my affinity with this magic have helped me overcome every obstacle.

As I explored the dungeons, I gained new abilities and knowledge, honing my combat style even further. Each victory boosted my confidence and motivated me to improve my skills even more.

My fame has increased among other explorers, and some have approached me to form a party, but I have chosen to continue my adventure alone. I have discovered that solitude allows me to explore freely and fully test my magic abilities.

Each completed dungeon has rewarded me with treasures, magical artifacts, and valuable rewards. I have earned a considerable amount of money, which I have reinvested in new equipment and magical items to further enhance my performance.

Despite my success, I always remain cautious and discreet, maintaining my false identity and black armor to avoid drawing too much attention to myself.

With each new dungeon I explore, the challenges become more demanding, but my passion for adventure and the desire to become a legendary adventurer push me forward.

My experience in rank F dungeons has taught me a lot about understanding which spells to use during combat, combat strategy, and myself. I am proud of my progress and look forward to facing new adventures and even greater challenges. The road to becoming an elite adventurer is still long, but I am ready to face it with courage and determination.

After three intense months of exploration and adventure in the dungeons, I have realized that excessive reliance on the dark affinity might be a limitation to my growth as an adventurer.

Once back at the academy, I will use the dark affinity as little as possible and focus on the basics of combat and swordsmanship. Additionally, I will learn new rank F spells to expand my repertoire of magical abilities.

In these three months, I have earned about 250,000 dollars, all thanks to the dark affinity. If I hadn't possessed this power, I wouldn't have even earned 15,000 dollars in these three months. I have already decided how I will use these earnings.