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Crystalline Devil

Medium · Fiend · CR 6 · Lawful Evil

Source. Tome of Beasts

15 (natural armor)

102 (12d8+48)

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

WIS

CHA

Overview

Category Monsters

Size Medium

Type Fiend

Alignment Lawful Evil

XP 2300

Initiative Bonus +1

Movement

Walk 30 ft (9.1 m)

Swim 15 ft (4.6 m)

Climb 15 ft (4.6 m)

Crawl 15 ft (4.6 m)

Senses

Darkvision 120 ft (36.6 m)

Passive Perception 11

Saving Throws

Wisdom +4 Charisma +4

Skills

Deception +8 Insight +4

Languages

Celestial, Common, Infernal, telepathy 120.0 ft (36.6 m).

Resistances & Immunities

Damage Immunities

fire, poison

Damage Resistances

acid, cold; bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons

Condition Immunities

poisoned

Environments

Caves Ruins Underworld Urban

Traits

Devil's Sight

Magical darkness doesn't impede the devil's darkvision.

Innate Spellcasting

while in the form of a gemstone, the devil is an innate spellcaster. Its spellcasting ability is Charisma (spell save DC 13). The devil can innately cast the following spells, requiring no material components:

2/day: command

1/day: suggestion

Magic Resistance

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

Sneak Attack (1/Turn)

The crystalline devil deals an extra 7 (2d6) damage when it hits a target with an attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the devil that isn't incapacitated and the devil doesn't have disadvantage on the attack roll.

Variant: Devil Summoning

some crystalline devils have an action option that allows them to summon other devils.

summon Devil (1/Day): The crystalline devil has a 25 percent chance of summoning one crystalline devil

Actions

Betraying Carbuncle

The crystalline devil takes the form of a gemstone worth 500 gp. It radiates magic in this form, but it can't be destroyed. It is fully aware and can see and hear its surroundings. Reverting to its usual form requires another action.

Claw

+7 to hit, reach 5 ft (1.5 m). Hit: 2d6 slashing damage.

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Crystalline Spray

Recharge 5–6

The crystalline devil magically sprays shards of crystal in a 15-foot cone. Each target in that area takes 17 (7d4) piercing damage, or half damage with a successful DC 15 Dexterity saving throw.

Multiattack

The devil makes two claw attacks.

About Crystalline Devil

Crystalline Devil is a medium fiend with a Challenge Rating of 6. It has a lawful evil alignment.

In combat, this creature maintains an Armor Class of 15 and possesses 102 hit points (derived from 12d8+48).

Crystalline Devil has communication capabilities including Celestial, Common, Infernal, telepathy 120 ft.. This allows it to interact verbally with various creatures and characters.

GM Tips: Using Crystalline Devil

1 tips available

When using Crystalline Devil in your D&D 5e campaign, consider these tactical approaches:

Telepathic Communication: This creature can communicate telepathically, making it excellent for coordination with allies. Silence spells won't stop its communication. Consider 'Mind Blank' or abilities that block telepathy.

Player Guide: Facing Crystalline Devil

1 strategies available

When your party encounters this creature, keep these strategies in mind:

Telepathy Awareness: This creature communicates telepathically! It can coordinate with allies silently. Silence won't stop it. Use 'Mind Blank' or abilities that block telepathy. Be cautious of mental attacks.

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 6.

Solo Encounter:

A single character of level 9 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 4,200 XP
Hard: 6,300 XP
Deadly: 8,400 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Crystalline Devil?: Crystalline Devil has a Challenge Rating of 6, making it appropriate for parties of level 6.0.
What type of creature is Crystalline Devil?: Crystalline Devil is a Medium Fiend, which affects how certain spells and abilities interact with it.
What languages does Crystalline Devil speak?: Crystalline Devil can communicate in Celestial, Common, Infernal, telepathy 120 ft..