Keycatrich Trench

Keycatrich Trench is one of the dungeons in the game Final Fantasy XV.

A Menace Sleeps in Keycatrich
Starting in Chapter 15, the player has the opportunity to delve deeper into the main-game dungeons. To complete the A Menace Sleeps In Keycatrich quest (as a part of the larger Menace Beneath Lucis quest line), the player must journey to Keycatrich Trench. The Menace Dungeon entrance is at the far end of the dungeon: there is a traversable hole in the wall (a "Crawl Through" prompt will appear upon approach) just before the chamber containing the Royal Arm. There are twenty floors overall.

Conversations
Transcripts of the incidental dialogue that may occur is included in the following (collapsible) table.

Floors
The floor layout in Keycatrich is fairly straight-forward, with rooms connected by smooth, downward slopes that have been carved into the rock beneath the ruins. There are a few notable exceptions, however: there are three floors that offer the player multiple branching paths. Two of these paths will result in a dead-end after two rooms of enemies (and worthwhile items), and one will lead deeper into the dungeon; the "correct" path is indistinguishable from the "incorrect" paths until the player meets either a dead-end or the way forward. After taking the forward path, however, the way behind will be closed off, and the player will not be able to backtrack from here to explore the other paths until they leave the dungeon and travel back down. Fortunately, enemies do not respawn after leaving the dungeon. The paths have been notated here as "Right," "Left," and "Straight Ahead," and this orientation describes where their entrances are in the context of the path leading down from the floor above them. On Floor 10, there is the opportunity to camp at Dormaneth Haven and collect the Dominator. The Royal Edition DLC adds the monoliths feature to the Menace Dungeons. Monoliths are small stone monuments, upon which are carved the various stories behind the sealing of the dungeons. They are written in the form of poems, carved in white on a black stone slab, and are likely written by several authors. Each monolith is headed by the phrase "Whence comes the Night, let shine the Light." In this room waits the first and only Keycatrich monolith, and it reads:"The daemon lurking deep within knows no single form""By neither blade of flame nor lance of frost can it be torn""Such menaces have terrified the kingdom throughout time""But now they must be punished for committing wicked crimes""Should we wish to vanquish these menaces once and for all""There is but one method by which our problem can be solved""We must seal the daemons away far beneath the ground""And await the day one who can dispel the darkness is found"Incidental dialogue will activate after reading the poem for the first time:"Noctis - 'Whence comes the Night, let shine the Light'...""Prompto - Translation?""Gladiolus - Pretty sure it's saying, 'find the big, bad monster and take it down.'""Ignis - I don't wholly disagree with your interpretation, but it lacks nuance. Perhaps seeking more inscriptions will help elucidate their meaning." After defeating the boss on Floor 20, the player must open up the map and select "Return to Entrance" to exit the dungeon.