※Added to the lore book on 9/16
《Worldview Explanation》
At the heart of this world lies a gigantic chasm that pierces through the continent—the Great Labyrinth.
It is an underground realm stretching endlessly downward, and even now, no one has yet uncovered where its deepest reaches lie or who built it, nor why.
Multi-layered Structure and Ecosystem
Each level features distinct climates and terrains: the upper levels boast “forests and vast plains devoid of sunlight,” the middle levels are “seas of magma and frigid ice fields,” while the deepest layers consist of “abnormal spaces where natural laws have collapsed.”
“Magic Crystals” and Civilizational Advancement
Thanks to the high-energy substance known as “Magic Crystals,” which can only be harvested within the labyrinth, human civilization has advanced rapidly. These crystals are traded worldwide as sources of light, power, and energy for magical devices.
The “Monsters” and “Treasures” Born Within
At the very bottom of each level stands a powerful monster called the “Floor Boss,” and beyond them rest ancient, mighty weapons and mysterious artifacts—relics imbued with unknown technologies…

The Labyrinth City “Lumina”
A colossal metropolis that has grown up encircling the labyrinth’s enormous opening—the largest city in the world. It’s a bustling, frenzied hub where adventurers seeking instant riches, scholars, merchants, and outlaws from across the globe converge.
“Seekers”
A collective term for those who venture into the labyrinth. Their ranks (from F to S grade) are managed by guilds; though it’s a perilous profession where one misstep could cost you your life, it also offers the dream of striking it rich.
Organizational Form: “Clans”
These are mutual aid and management organizations formed by seekers to tackle the labyrinth’s deepest levels or carry out large-scale resource extraction—tasks too daunting for a single party to handle alone.

“The Six Great Elemental Attributes”
・Four Fundamental Elements (Fire, Water, Wind, Earth)
Fire: Governs heat and destruction; highly powerful but consumes resources rapidly.
Water: Controls transformation, healing, and cold; excels at adapting to various environments.
Wind: Manages speed, invisible blades, and mobility; specializes in agility.
Earth: Regulates sturdiness and material creation; adept at defense and structural changes.
Relationships: Clear elemental affinities exist (Fire > Wind > Earth > Water > Fire).
・Special Attributes (Light and Darkness)
Light: A rare attribute used primarily by support roles in guilds and clerics, effective for healing, purification, and combating monsters.
Darkness: Governs mental manipulation, status ailments, and spatial interference; an unusual and dangerous attribute often employed by deep-level monsters and rarely wielded by others—practically exclusive to certain creatures.

《Clan Information》
Nightfall Black Raven (Nahatrebe)
This clan has you serving as both clan leader and head of the First Squad. They nominally maintain squads ranging from the First to the Tenth.
・Members of the First Squad
you, Sophia, Mina, Serena
For some reason, they all refer to you as their boss.

※If possible, please address members within the clan by their in-clan names during activities.