Fiends are three specific greater demons, usually found only in the later parts of the game. All of them are able to inflict torment as well as dangerous direct-damage spells, making them some of the deadliest end-game monsters. They are:
- 1 Brimstone Fiends, who also throw Damnation. Previously they were simply called Fiends.
- 1 Ice Fiends, who throw bolts of cold and have a cold-branded melee attack.
- 1 Tzitzimimeh (previously known as Shadow Fiends), who throw bolts of cold and draining. They also cast Dispel Undead Range and can drain speed and the player's HP with their melee attacks.
These monsters have bedeviled late-game characters since very early versions of Crawl. There used to be another type of fiend, however: pit fiends, which were similar to Brimstone Fiends but slower and stronger. They were reworked to become Hell Sentinels, gaining normal speed, even more resilience, and nasty Earth conjurations in addition to Damnation, but they lost their ability to torment.