Skull of Misery

An undead creature, the first one was created by a servant of Huarral "Spirit of Disease and Decay". It is unclear why this undead was formed by the same process that turned others in to Cursed of Huarral

Skull of Misery CR: 4

Tiny undead, neutral evil

Armor Class: 17 (Natural Armor)

Hit Points: 28 (40d4 + 8)

Speed: , fly: 30 ft

STR

8 -1

DEX

18 +4

CON

12 +1

INT

16 +3

WIS

12 +1

CHA

16 +3

Saving Throws: CON +4, INT +4, CHA +5

Skills: Arcana +4, History +4

Damage Resistances: Necrotic; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Silvered

Damage Immunities: Poison

Condition Immunities: Exhaustion, Poisoned

Senses: Darkvision 60 ft., Passive Perception 11

Languages: the languages it knew in life

Challenge Rating: 4

Aura of Misery. Any creature that moves within 10 feet of the skull must make a Wisdom Saving throw (DC 13) or become overwhelmingly sad. On its turn, it can use either an action or a bonus action, not both. Regardless of the creature's abilities or magic items, it can't make more than one melee or ranged attack during its turn. It can repeat the saving throw at the end of its turn or if it moves out of range.
Magic Resistance. The skull has advantage on saving throws against spells and other magical effects.

Turn Resistance. The skull has advantage on saving throws against any effect that turns Undead.
Unusual Nature. The skull doesn’t require air, food, drink, or sleep.

Actions

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 5 (1d4+3) piercing damage plus 10 (3d6) poison damage
Spellcasting. The skull casts one of the following spells, using Charisma as the spellcasting ability (spell save DC 13):
At will: detect magic, magic missile (as a 1st-level spell), hellish rebuke, mage hand
1/day each: dispel magic, Spirit Shroud, invisibility, hold person

A floating skull that weeps a black ichor from its open eye cavities. A soft moan escapes through the gaps of its teeth.