Is It Wrong To Level Up In A Dungeon?

Chapter 29. The Demon Castle

[ Item Acquired: Key to the Demon's Castle ]
Difficulty Level: A
Type: Key
A key that grants access to the Demon's Castle, obtained by slaying the Gatekeeper.

[ Would you like to use the key to enter the Demon's Castle? ]

Yes / No

Without hesitation, Bell selected Yes.

[ New Quest Acquired! ]

The massive gate creaked open, revealing a long, desolate hallway bathed in eerie silence. Shadows flickered against the cold stone walls, stretching toward a distant opening at the far end. Bell stepped forward, his grip tightening on his blade.

Ding!

[ Regular Quest: Collect the Demons' Souls! (1) ]

The Demon's Castle is teeming with fiendish creatures. Defeat them and harvest their souls for a special reward.

Quest Objective: Collect 10,000 Demon Souls

Rewards:

Select any item from the shop

Bonus Stats +20

??? (Undisclosed Reward)

Bell exhaled sharply, feeling a familiar rush of anticipation. It had been a while since he'd received a quest like this.

Pressing forward, he reached the corridor's end and stepped into a world engulfed in fire. Towering obsidian spires loomed in the distance, rivers of molten lava carving through the landscape. The air reeked of sulfur and death.

A horde of demons awaited him, their crimson eyes glowing with hunger.

[ Each demon you slay will grant you a single soul. However, demons with multiple souls reside in the upper levels of the castle. ]

Bell didn't hesitate.

He lunged forward, his blade flashing in a deadly arc. The first demon barely had time to react before its body was cleaved in two, vanishing into a swirl of dark mist. The others snarled and charged, but Bell met them head-on, moving like a phantom through the battlefield.

Slash!

[ You have defeated a low-ranking demon. ] ×3
[ You have obtained 100 experience points. ] ×3
[ You have obtained a demon's soul. ] ×3

Bell flicked the blood from his blade, his gaze already locked onto the next wave of enemies.

[ Experience required to level up: 55,600 ]

A grin tugged at the corner of his lips.

Time to start the hunt.

The battle was relentless.

Bell darted through the infernal halls of the Demon's Castle, his blade a silver blur as it carved through the monstrous tide. Each clash was a symphony of destruction—flames roared, steel sang, and the agonized shrieks of demons filled the air.

Slash!

A lesser demon lunged at him, jagged claws tearing through the space he had occupied mere moments ago. Bell spun, his sword flashing in a precise arc, separating the creature's head from its shoulders.

[ You have defeated a low-ranking demon. ]
[ You have obtained a demon's soul. ]

The system notifications barely registered in his mind. He had no time to count—only to fight.