Glabrezu

A glabrezu (or treachery demon) is a type of fiend known for using trickery and dubious bargains to ruin weak-willed and short-sighted mortals—but also for having the physical prowess to engage in battle directly.

Abilities
The following is drawn from the Monster Manual, 5th Edition. A glabrezu has only been shown onstream in a summary of prestream events.
 * Immunities:
 * Damage Resistance: Cold, fire, lightning, bludgeoning/piercing/slashing form nonmagical attacks
 * Damage Immunities: Poison
 * Condition Immunities: Poisoned
 * Senses: Truesight
 * Languages: Abyssal, telepathy
 * Innate Spellcasting: Can cast a several spells which require no material components.
 * At will: Darkness, Detect Magic, Dispel Magic
 * 1/day each: Confusion, Fly, Power Word Stun
 * Attacks:
 * Multiattack: The glabrezu can make four attacks.
 * Pincer: The glabrezu can attack with its two pincer which can grapple each one target.
 * Fist: The glabrezu can attack a target in reach with its fist.

History
A glabrezu pretending to be a "devil prince" named Juurezel had infiltrated the palace of Sovereign Uriel Tal'Dorei III in Emon. Vox Machina made a pact with it in exchange for a Wish, which they used before completing the bargain—wishing to cancel the contract. The party attacked Juurezel, but during the fight, Pike was slain by a critical hit as the glabrezu picked her up in its pincer-like hand and cut her in half.