The Depths
Version 0.14: This article may not be up to date for the latest stable release of Crawl.
The Depths are a five-floor branch accessed through a guarded portal on Dungeon:15. Its layout generally resembles that of the Dungeon, although it has a greater tendency toward elaborate full floor vaults. Along with several entrances to the Abyss, the Vestibule of Hell, and Pandemonium, you can find the entrance to the Realm of Zot on Depths:5, guarded by a variety of draconian guards.
Monsters
c Yaktaur.
T Deep troll.
p Hell knight.
g Boggart.
C Ettin.
C Stone giant.
C Fire giant.
C Frost giant.
C Titan.
H Sphinx.
D Fire dragon.
D Ice dragon.
D Storm dragon.
D Bone dragon.
u Ugly thing.
W Flayed ghost.
History
The Depths were added in 0.14, replacing floors 16-27 of the Dungeon.