Mormesk the Wraith
Medium Undead (Incorporeal), Neutral Evil

Armor Class 13

Hit Points 67 (9d8 + 27)

Speed 5 ft., Fly 60 ft. (hover)

STR

6 (-2)

DEX

16 (+3)

CON

16 (+3)

INT

12 (+1)

WIS

14 (+2)

CHA

15 (+2)

Vulnerabilities Radiant

Resistances Acid, Bludgeoning, Cold, Fire, Piercing, Slashing

Immunities Necrotic, Poison; Charmed, Grappled, Paralyzed, Petrified, Prone, Restrained, Unconscious

Senses Darkvision 60 ft., passive Perception 12

Languages Common, Elvish, Dwarvish

Challenge 5 (1,800 XP; PB +3)

Incorporeal Movement. Mormsk can move through other creatures and objects as if they were Difficult Terrain. Mormesk takes 5 (1d10) Force damage if it ends its turn inside an object. A creature takes 5 (1d10) Psychic damage the first time Mormesk passes through them on a turn.

Sunlight Sensitivity. While in sunlight, Mormesk has Disadvantage on ability checks and attack rolls 

Throes of Oblivion. When Mormesk dies, it collapses inward and creates a burst of painful psychic energy. Each creature within 20 feet must make a DC 14 Constitution Saving Throw. Failure: 18 (4d8) Psychic damage, half on Success.

ACTIONS

Life Drain. Melee Spell Attack Roll: +6 to hit, reach 5 ft, one target. Hit: 16 (3d8 + 2) Necrotic damage, and the target must succeed on a DC 14 Constitution Saving Throw or be Dazed and have their HP Maximum reduced by the amount of damage received. HP Maximum is reduced until the target completes a Long Rest.

If a humanoid dies within 1 minute of being hit by this attack, their spirit rises as a Specter under the control of Mormesk.

Psychic Enervation. Ranged Spell Attack: +6 to hit, range 60 ft., one target. Hit: 10 (3d6 + 2) Psychic damage and the target must succeed on a DC 14 Wisdom Saving Throw or fall Prone and become Frightened of Mormesk for 1 minute, Saving Throw repeats at end of target’s turn. While Frightened in this manner, the target cannot stand from Prone.

REACTIONS

Denied Vitality. Then a creature who Mormesk can see within 30 feet regains HP, Mormesk can attempt to sap the life energy from restoring the creature. The target must make a DC 14 Constitution Saving Throw or only gain half of the HP it would gain, and Mormesk regains HP instead.