Crystalline Monolith 2014

CR 7 aberration

Huge aberration, lawful neutral

Armor Class: 15 (natural armor)
Hit Points: 123 (13d12+39)
Speed: fly 30 ft. (hover)

STR14 (+2)

DEX10 (+0)

CON16 (+3)

INT19 (+4)

WIS17 (+3)

CHA17 (+3)

Saving Throws
Skills: Arcana +7, History +7, Insight +6, Nature +7, Perception +6
Resistances: cold, fire
Damage Immunities: poison
Condition Immunities: blinded, paralyzed, petrified, poisoned, prone
Senses: blindsight 120 ft., passive Perception 16
Languages: Deep Speech, Undercommon, telepathy 120 ft.
Challenge: 7 (2,900 XP) · Proficiency Bonus +3

False Appearance.

While the crystalline monolith remains motionless, it is indistinguishable from a giant crystal.

Innate Spellcasting (Psionics).

The crystalline monolith’s innate spellcasting ability is Intelligence (spell save DC 15). It can innately cast the following spells, requiring no components: At will: detect magic, detect thoughts, mage hand, silent image 3/day each: clairvoyance, hypnotic pattern, stinking cloud, telekinesis 1/day each: confusion, dominate person, suggestion

Magic Resistance.

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

Powerful Mind.

The crystalline monolith has advantage on Intelligence saving throws and ability checks.

Actions

Cast a Spell (Costs 3 Actions).

The crystalline monolith casts a spell from its list of innate spells, expending a daily use as normal.

Multiattack.

The crystalline monolith makes two slam attacks or two mind spear attacks. If both slam attacks hit a Large or smaller target, the target must succeed on a DC 14 Constitution saving throw or begin to turn to crystal and be restrained. The restrained creature must repeat the saving throw at the end of its next turn, becoming petrified on a failure or ending the effect on a success.

Teleport (Costs 2 Actions).

The crystalline monolith magically teleports up to 120 feet to an unoccupied space it can see.

Slam.

Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 11 (2d8 + 2) bludgeoning damage.

Mind Spear.

Ranged Spell Attack: +7 to hit, range 30 ft., one target. Hit: 14 (4d6) psychic damage.

Psychic Burst (Recharge 5–6).

The crystalline monolith emits a burst of psychic energy in a 30-foot cone. Each creature in that area must succeed on a DC 15 Intelligence saving throw or take 28 (8d6) psychic damage and be stunned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Legendary Actions

Detect.

The crystalline monolith makes a Wisdom (Perception) check.

Teleport (Costs 2 Actions).

The crystalline monolith magically teleports up to 120 feet to an unoccupied space it can see.

Cast a Spell (Costs 3 Actions).

The crystalline monolith casts a spell from its list of innate spells, expending a daily use as normal.

Source: Tome of Beasts 2 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details