Allip

Allips were undead creatures. They were created when someone learned knowledge that a powerful being protected.

Appearance
Allips were warped, spectral versions of their living selves. Their lower body trailed into a dark fog instead of legs.

Abilities

 * Damage Resistances: Nonmagical physical weapon, or fire damage.
 * Damage Vulnerabilities:  Holy water caused him to ignite in radiant flames.
 * Senses: Darkvision
 * Incorporeal Movement:  Able to fly and shift trough walls. which can cause damage
 * Attacks:
 * Maddening Touch: Melee spell attack that deals psychic damage.
 * Whispers of Madness: Allip chooses 3 creatures and deals psychic damage.
 * Howling Babble: Every creature within 30 feet has to make a saving throw or take psychic damage and be stunned.

Known Allips
The Mighty Nein encountered an allip version of Siff Duthar in his Abandoned Research Facility.