Warning: This is 3.0 Edition material. It is possible that there is more recent 3.5 Edition version.


(Book of Vile Darkness variant, p. 54)

A demonologist is a mortal who has devoted his life to the study of demons.


Alignment: Chaotic evil

Skills: Knowledge (arcana) 4 ranks , Knowledge (the planes) 8 ranks

Feats: Evil Brand , Sacrificial Mastery , Malign Spell Focus

Special: Must be able to cast at least six arcane spells of the Conjuration school, one of which must be at least 3rd level.

Hit die


Skill points

4 + Int

Class Features

All the following are class features of the demonologist prestige class.

Weapon and Armor Proficiency: Demonologists are proficient with no weapons, armor, or shields.

Spells: Beginning at 1st level, a demonologist gains the ability to cast a small number of arcane spells. To cast a spell, the demonologist must have a Charisma score of at least 10 + the spell's level, so a demonologist with a Charisma of 10 or lower cannot cast these spells. Demonologist bonus spells are based on Charisma, and saving throws against these spells have a DC of 10 + spell level + Charisma modifier. The demonologist's spell list appears below; a demonologist has access to any spell on the list and need not prepare those spells ahead of time, just like a sorcerer. A demonologist casts spells just as a sorcerer does.

Charm Demon (Sp): A 1st-level demonologist can attempt to charm a chaotic evil outsider, as described in the charm person spell, once per day. The demon does not get to use its spell resistance, though it can make a saving throw as normal (DC 11 + demonologist's Cha modifier).

Quasit Familiar (Ex): A 2nd-level demonologist gains a quasit as a familiar, whether he wants it or not. If the demonologist already has a familiar, the quasit devours it and takes its place, but the character suffers no experience point loss. The quasit is treated as a normal familiar, using the class level of the demonologist as the master's level (see the Familiars section in Chapter 3 of the Player's Handbook for familiar abilities).

Summoning Mastery (Su): When a demonologist of 3rd level or higher casts a summon monster spell, it is treated as the equivalent spell of two levels higher for purposes of summoning chaotic evil creatures. For example, a demonologist refers to the summon monster IV list for chaotic evil outsiders when casting summon monster II. At 6th level, the demonologist refers to the summoning list three levels higher than the one for the summon monster spell he is casting. At 9th level, the demonologist refers to the list four levels higher.

Resistances (Su): A demonologist who reaches 4th level gains acid resistance 10, cold resistance 10, fire resist- ance 10, and electricity resistance 20.

Poison Immunity (Ex): A 5th-level demonologist is immune to poison.

Hold Demon (Sp): A 7th-level demonologist can attempt to hold a chaotic evil outsider, as described in the hold person spell, once per day. The demon does not get to use its spell resistance, though it can make a saving throw as normal (DC 12 + demonologist's Cha modifier).

Telepathy (Su): An 8th-level demonologist can communicate telepathically with any creature within 100 feet that has a language, just as a tanar'ri can.

Dominate Demon (Sp): A 10th-level demonologist can attempt to dominate a chaotic evil outsider, as described in the dominate person spell, once per day. The demon does not get its spell resistance, but it can make a saving throw as normal (DC 15 + demonologist's Cha modifier).


Spells per Day
Level BAB Fort Ref Will Special 1st 2nd 3rd 4th
1st +0 +0 +0 +2 Charm demon 1
2nd +1 +0 +0 +3 Quasit familiar 1 1
3rd +1 +1 +1 +3 Summoning mastery +2 2 1 1
4th +2 +1 +1 +4 Resistances 2 2 1 1
5th +2 +1 +1 +4 Poison immunity 3 2 2 1
6th +3 +2 +2 +5 Summoning mastery +3 3 3 2 2
7th +3 +2 +2 +5 Hold demon 3 3 3 2
8th +4 +2 +2 +6 Telepathy 4 3 3 3
9th +4 +3 +3 +6 Summoning master +4 4 4 3 3
10th +5 +3 +3 +7 Dominate demon 4 4 4 3

Class skills

Skill name Key ability Trained only Armor check penalty
Alchemy Int yes no
Bluff CHA no no
Concentration CON no no
Decipher Script INT yes no
Forgery INT no no
Intimidate CHA no no
Knowledge (arcana) INT yes no
Knowledge (religion) INT yes no
Ride DEX no no
Scry Int yes no
Sense Motive WIS no no
Spellcraft INT yes no

Spells for Demonologist