Glabrezu

A glabrezu takes great pleasure in destroying mortals through temptation, and these creatures are among the few demons to offer their service to creatures foolish enough to summon them.
Although glabrezus are devastating in combat, they prefer to tempt victims into ruin, using power or wealth as a lure. Engaging in guile, trickery, and evil bargains, a glabrezu hoards riches that it uses to fulfill promises to shortsighted summoners and weak-willed mortals. However, if its attempts to entice or deceive fail, a glabrezu has the strength to fight and win.

Demons

Spawned in the Infinite Layers of the Abyss, Demons are the embodiment of chaos and evil-engines of destruction barely contained in monstrous form. Possessing no compassion, empathy, or mercy, they exist only to destroy.

Spawn of Chaos

The Abyss creates demons as extensions of itself, spontaneously forming fiends out of filth and carnage. Some are unique monstrosities, while others represent uniform strains virtually identical to each other. Other demons (such as manes) are created from mortal souls shunned or cursed by the gods, or which are otherwise trapped in the Abyss.

Capricious Elevation

Demons respect power and power alone. A greater demon commands shrieking mobs of lesser demons because it can destroy any lesser demon that dares to refuse its commands. A demon's status grows with the blood it spills; the more enemies that fall before it, the greater it becomes.
A demon might spawn as a manes, then become a dretch, and eventually transform to a vrock after untold time spent fighting and surviving in the Abyss. Such elevations are rare, however, for most demons are destroyed before they attain significant power. The greatest of those that do survive make up the ranks of the demon lords that threaten to tear the Abyss apart with their endless warring.
By expending considerable magical power, demon lords can raise lesser demons into greater forms, though such promotions never stem from a demon's deeds or accomplishments. Rather, a demon lord might warp a manes into a quasit when it needs an invisible spy, or turn an army of dretches into hezrous when marching against a rival lord. Demon lords only rarely elevate demons to the highest ranks, fearful of inadvertently creating rivals to their own power.

Glabrezu CR: 9 (5,000 xp)

Large fiend (demon), chaotic evil

Armor Class: 17

Hit Points: 157 (15d10 + 75)

Speed: 40 ft

STR

20 +5

DEX

15 +2

CON

21 +5

INT

19 +4

WIS

17 +3

CHA

16 +3

Saving Throws: Str +9, Con +9, Wis +7, Cha +7

Damage Resistances: cold, fire, lightning; bludgeoning, piercing, and slashing from nonmagical attacks

Damage Immunities: poison

Condition Immunities: poisoned

Senses: truesight 120 ft., passive Perception 13

Languages: Abyssal, telepathy 120 ft.

Challenge Rating: 9 (5,000 xp)

Innate Spellcasting. The glabrezu’s spellcasting ability is Intelligence (spell save DC 16). The glabrezu can innately cast the following spells, requiring no material components:

At will: darkness, detect magic, dispel magic

1/day: confusion, fly, power word stun

Magic Resistance. The glabrezu has advantage on saving throws against spells and other magical effects.

Actions

Multiattack. The glabrezu makes four attacks: two with its pincers and two with its fists. Alternatively, it makes two attacks with its pincers and casts one spell.
Pincer. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 5) bludgeoning damage. If the target is a Medium or smaller creature, it is grappled (escape DC 15). The glabrezu has two pincers, each of which can grapple only one target.
Fist. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 2) bludgeoning damage.