Though demons all have common names, every demon lord and every demon of type 1 through 6 has a true name that it keeps secret. A demon can be forced to disclose its true name if charmed, and ancient scrolls and tomes are said to exist that list the true names of the most powerful demons.
A mortal who learns a demon’s true name can use powerful summoning magic to call the demon from the Abyss and exercise some measure of control over it. However, most demons brought to the Material Plane in this manner do everything in their power to wreak havoc or sow discord and strife.
Demonologists organize the chaotic distribution of demons into broad categories of power known as types. Most demons fit into one of six major types, with the weakest categorized as Type 1 and the strongest as Type 6. Demons outside the six main types are categorized as minor demons and demon lords.
|1||barlgura, shadow demon, vrock|
Some demons can have an action option that allows them to summon other demons. Summon Demon (1/Day). The demon chooses what to summon and attempts a magical summoning.
A balor has a 50 percent chance of summoning 1d8 vrocks, 1d6 hezrous, 1d4 glabrezus, 1d3 nalfeshnees, 1d2 mariliths, or one goristro.
A barlgura has a 30 percent chance of summoning one barlgura.
A chasme has a 30 percent chance of summoning one chasme.
A glabrezu has a 30 percent chance of summoning 1d3 vrocks, 1d2 hezrous, or one glabrezu.
A hezrou has a 30 percent chance of summoning 2d6 dretches or one hezrou.
A marilith has a 50 percent chance of summoning 1d6 vrocks, 1d4 hezrous, 1d3 glabrezus, 1d2 nalfeshnees, or one marilith.
A nalfeshnee has a 50 percent chance of summoning 1d4 vrocks, 1d3 hezrous, 1d2 glabrezus, or one nalfeshnee.
A vrock has a 30 percent chance of summoning 2d4 dretches or one vrock.
A yochlol has a 50 percent chance of summoning one yochlol.
A summoned demon appears in an unoccupied space within 60 feet of its summoner, acts as an ally of its summoner, and can’t summon other demons. It remains for 1 minute, until it or its summoner dies, or until its summoner dismisses it as an action.