Gleason's Gielinor Guide

Demons are a category of creature characterized by a beastly appearance, and often a red or black colouration. Most demons are followers of Zamorak, the god of chaos, and as such, are often considered to be evil. Demons prefer attacking with melee, although a few are also known to use ranged and magical attacks. When a demon dies, they typically leave behind demonic ashes instead of bones as their flesh burns to ash.^[1] Demons originate from their home world of Infernus, also known as the Infernal Dimensions.

A wide variety of creatures are encompassed in this category, including many which are not explicitly referred to as demons in-game. Some demons are considered sub-classes of other varieties, and thus will count towards a Slayer task for the primary class. These cases are labelled in parenthesis. There are multiple types of demons: Avernic demons, such as Thammaron, Tsutsaroth demons (a tribe of Avernic demons), such as K'ril Tsutsaroth and Porazdir, and Chthonian demons, such as Duke Sucellus and Duke Mephitis.

Demons are weak to demonbane weapons, which include certain spells, specially made weapons which are tuned to demons^[2]^[3], and weapons constructed out of demon parts or coated in demon blood (as demons are well-suited towards killing each other).^[4] Holy water is also known to weaken demons.

Demons tend to stay where they were initially summoned, being unable to leave until they are summoned elsewhere by someone else.^[5] They also do not need to be present in physical form to affect the world - it is said that some demons remain in the Infernal Dimensions and from there, use magic to work behind the scenes to cause natural disasters and accidents in Gielinor.^[6] These demons can be forcefully summoned to Gielinor to reduce their influence, an example of which being Agrith Naar, who was summoned and trapped in a human body by Saradominists, preventing him from using his magics.^[7]^[8]

Types of demons

Standard

Imp
- Imp Champion
- Scarred imp
Lesser demon
- Lesser Demon Champion
- Scarred lesser demon
Greater demon
- Scarred greater demon
Black demon
- Scarred black demon
Abyssal demon
- Greater abyssal demon
Ice demon
Tormented Demon

Other Demons

Bloodveld
- Insatiable Bloodveld
Mutated Bloodveld
- Insatiable Mutated Bloodveld
Blood Reaver
Demonic gorilla (Black demon)
Hellhound
- Skeleton Hellhound
  - Skeleton Hellhound (Vet'ion)
  - Greater Skeleton Hellhound (Vet'ion)
  - Skeleton Hellhound (Calvar'ion)
  - Greater Skeleton Hellhound (Calvar'ion)
- Scarred hellhound
Nechryael
Greater Nechryael
- Death spawn
- Nechryarch
  - Chaotic death spawn

Fiend

Icefiend
Pyrefiend
- Flaming pyrelord
Waterfiend
Pyrelord
- Infernal pyrelord

Revenant

Revenant imp
Revenant hellhound
Revenant pyrefiend
Revenant demon

Boss

Abyssal Sire (Abyssal demon)
Cerberus (Hellhound)
K'ril Tsutsaroth (Greater demon)
- Balfrug Kreeyath (Black demon)
- Tstanon Karlak (Greater demon)
- Zakl'n Gritch (Lesser demon)
Porazdir (Black demon, but only harmed by Flames of Zamorak)
Skotizo (Black demon, Greater demon)
Zalcano
Duke Sucellus (Chthonian demon, 30% demonbane resistance)
Yama
- Judge of Yama
Doom of Mokhaiotl
- Demonic larva

Quest

NPCs

Alathazdrar (Demon butler)
Dunce
Lithil
Mazchna
Achtryn
Sergeant Damien
Thammaron
The Overseer
Hell-Rat
Hell-Rat Behemoth
Imp defender
Jim
Imp (Yama)
Imp (Demonic Pacts League)
Sageguard Melacar
Sageguard Vandred

Pets

Abyssal orphan
Hellcat
Hellpuppy
K'ril Tsutsaroth Jr.
Skotos
Smolcano
Baron
Yami
Dom

References

^ "Duradel's notes". Old School RuneScape. "Unfortunately, most of their flesh burns to ash the moment it is severed from their body, although it seems like some organs are more resistant than others."
^ "Display case (Varrock Museum, number 25)". Old School RuneScape. "A striking example of early 5th Age weapon-smithing, this steel sword has been magically treated to make it especially powerful against demons. It originally belonged to a warrior who defended Varrock from the demon Delrith, and was recently used to drive off the very same demon once again."
^ "Bloody diary". Old School RuneScape. "Being requested by a group of dwarves underground to quell the demon's rage, they forged me a silver sword combined with some mystical metal, which they claimed was carefully tuned to greatly harm demons."
^ "Duradel's notes". Old School RuneScape. "Of all the creatures I have slain, demons are the most well suited to killing each other. Everything from their blood to their magic is designed to be corrosive to their own kind."
^ Lithil. Old School RuneScape. "Demons tend to stay where they were summoned. You see, once they're done eating the stupid wizard that thought it could control a demon, they're pretty much stuck until someone else decides to summon them."
^ Ellemar. "Demonic tome". Old School RuneScape. "Not all demons are most dangerous when they are on our plane as physical beings. There is also a more subtle demonic influence that pervades our world, with demons working behind the scenes to cause natural disasters and accidents. The chief among these demons is Agrith-Naar."
^ Ellemar in Shadow of the Storm. "Demonic tome". Old School RuneScape. "We had prepared a magical cage, and with difficulty we imprisoned the demon. However, we were unable to destroy him, though we tried every physical and magical means. Furthermore, the magical cage was weakening, and we feared it would not be able to contain him for long. Therefore we decided to" Note: The transcript ends after this, with the rest torn out.
^ Matthew in Shadow of the Storm. Old School RuneScape. "Ellemar's book said that Agrith Naar can only use his powerful magics from the demon plane. Ellemar must have trapped him in human form to stop him using his magics. That must be what the last pages of the book said."