Dungeon

Biodata

Nature and Behavior

The Dungeon is a vast subterranean labyrinth whose true end is unknown even to the gods. Entering it separates adventurers from the surface world’s sun, moon, seasons, and elements, replacing them with an endlessly descending environment of caverns, monsters, and danger. 22

It is explicitly described as alive. Rather than acting as a passive setting, it waits for adventurers to become vulnerable, sets traps, and exploits lapses in vigilance to force them into desperate situations. 22 28

• It generates monsters directly from its walls. 22
• Its monster population and activity can change abruptly, causing adventurers to suspect an impending anomaly. 23
• Excessive destruction of the Dungeon environment may trigger an anomaly. 24
• Monsters that consume too many magic stones can become dangerous Irregulars. 7

Known Floors and Regions

Abilities and Properties

Monster Generation

The Dungeon’s walls can crumble and release newly formed monsters into surrounding chambers. This occurred as Noah’s party advanced through the upper floors. 22

• Monster strength, quantity, and respawn speed increase substantially in the middle floors. 23
• Middle-floor monsters possess ranged attacks in addition to melee capabilities. 23
• Defeated monsters leave behind magic stones and other materials, allowing adventurers to profit from exploration. 4

Ambushes and Environmental Threats

The Dungeon uses its terrain and timing to endanger explorers rather than relying only on direct monster attacks. Riveria warns that even high-level adventurers may survive deep-floor expeditions only to die on the upper floors through carelessness. 22

• It may exploit weakened or distracted adventurers with traps and sudden attacks. 28
• During the Goliath incident, it struck at a critical moment, turning an already dangerous encounter into a near-fatal situation for the Astraea Familia. 28
• Thanatos’s use of Arcanum on the 12th Floor caused the labyrinth to shake violently and sections of its walls and passages to collapse. 2

Dungeon Strikes

A “Dungeon strike” is a major hostile response encountered during exploration.

• The Loki Familia encountered a strike on the 37th Floor after reaching it in record time, with Obsidian Soldier units appearing first. 48
• The danger of such responses forced the expedition to withdraw despite Noah serving as its vanguard. 48

Story Role / Major Incidents

• Ais’s flight into the Dungeon — After fleeing Riveria, Ais enters the 12th Floor and uses combat against its monsters to suppress her loneliness. Thanatos subsequently exploits the location to confront her and release a strengthened Jet-Black Wyvern. 2
• Noah’s first ordeal — Noah becomes lost in the Dungeon after intervening against Thanatos’s group and fighting the Jet-Black Wyvern. He kills monsters while navigating the labyrinth and later sells their drops in Babel. 2 3 4
• First Line of Death expedition — Noah, Riveria, and Ais rapidly descend from the upper floors to the 13th Floor, where the Dungeon’s terrain and ranged monsters mark the beginning of the middle-floor danger zone. 22 23
• Goliath battle — Noah’s party reaches the 17th Floor’s Wall of Sighs on his first Dungeon expedition. Goliath’s appearance later endangers the Astraea Familia before Noah defeats it. 25 27 28 30
• 37th Floor strike — The Loki Familia reaches the 37th Floor in four days, but the Dungeon’s strike interrupts the expedition and compels a retreat. 48

Notable Quotes

“Because the Dungeon is alive. It strikes when adventurers are at a disadvantage, plunging them into despair.” 22

“The Dungeon is alive! It waits patiently for the right moment, sets traps in the shadows, and the second the adventurers let their guard down, it seizes the opportunity to push the creatures of the Lower World into an abyss of despair!” 28