Alhoon

Medium undead (mind flayer, wizard), Neutral Evil

Armor Class15 (natural armor)
Hit Points150 (20d8 + 60)
Speed30 ft., fly 15 ft. (hover)
STRDEXCONINTWISCHA
11 (+0) 12 (+1) 16 (+3) 19 (+4) 17 (+3) 17 (+3)
Saving ThrowsCha +7, Con +7, Int +8, Wis +7
SkillsArcana +8, Deception +7, History +8, Insight +7, Perception +7, Stealth +5
Damage Vulnerabilities—
Damage Resistancescold; lightning; necrotic
Damage Immunitiespoison
Condition Immunitiescharmed; exhaustion; frightened; paralyzed; poisoned
Sensestruesight 120 ft., passive Perception 17
LanguagesDeep Speech, Undercommon, telepathy 120 ft.
Challenge10

Traits

Magic Resistance.

The alhoon has advantage on saving throws against spells and other magical effects.

Turn Resistance.

The alhoon has advantage on saving throws against any effect that turns Undead.

Actions

Multiattack.

The alhoon makes two Chilling Grasp or Arcane Bolt attacks.

Chilling Grasp.

Melee Spell Attack Roll: +8 to hit, reach 5 ft., one target. Hit: 14 (4d6) cold damage, and the alhoon regains 14 hit points.

Arcane Bolt.

Ranged Spell Attack Roll: +8 to hit, range 120 ft., one target. Hit: 28 (8d6) force damage.

Mind Blast (Recharge 5-6).

The alhoon magically emits psychic energy in a 60-foot cone. Each creature in that area must succeed on a DC 16 Intelligence saving throw or take 22 (4d8 + 4) psychic damage and be stunned for 1 minute. A target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Reactions

Negate Spell (3/Day).

The alhoon targets one creature it can see within 60 feet of it that is casting a spell. If the spell is 3rd level or lower, the spell fails, but any spell slots or charges are not wasted.

Spellcasting

The alhoon casts one of the following spells, requiring no material components and using Intelligence as the spellcasting ability (spell save DC 16):

At will: dancing lights, detect magic, detect thoughts, disguise self, mage hand, prestidigitation

1 each/day: dominate monster, globe of invulnerability, invisibility, modify memory, plane shift (self only), wall of force