Warlock of the Great Old One

Medium humanoid, Any alignment

Armor Class13, 16 with mage armor
Hit Points91 (14d8 + 28)
Speed30 ft.
STRDEXCONINTWISCHA
9 (-1) 16 (+3) 15 (+2) 12 (+1) 12 (+1) 18 (+4)
Saving ThrowsCha +7, Wis +4
SkillsArcana +4, History +4
Damage Vulnerabilities—
Damage Resistancespsychic
Damage Immunities—
Condition Immunities—
Sensesdarkvision 60 ft., passive Perception 11
Languagesany two languages, telepathy 30 ft.
Challenge6

Traits

Whispering Aura.

At the start of each of the warlock's turns, each creature of its choice within 10 feet of it must succeed on a DC 15 Wisdom saving throw or take 10 (3d6) psychic damage, provided that the warlock isn't incapacitated.

Actions

Multiattack.

The warlock makes two Dagger attacks.

Dagger.

Melee or Ranged Attack Roll: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 5 (1d4 + 3) piercing damage plus 10 (3d6) psychic damage.

Howling Void.

The warlock opens a momentary extraplanar rift within 60 feet of it. The rift is a scream-filled, 20-foot cube. Each creature in that area must make a DC 15 Wisdom saving throw. On a failed save, a creature takes 9 (2d8) psychic damage and is frightened of the warlock until the start of the warlock's next turn. On a successful save, a creature takes half as much damage and isn't frightened.

Spellcasting

The warlock casts one of the following spells, using Charisma as the spellcasting ability (spell save DC 15):

At will: detect magic, guidance, levitate, mage armor (self only), mage hand, minor illusion, prestidigitation

1 each/day: arcane gate, detect thoughts, true seeing