Aurnozci

Gargantuan fiend (demon), chaotic evil

Armor Class

16 (natural armor)

Hit Points

370 (20d20 + 160)

Speed

50 ft., burrow 30 ft.

Saves

str +15, con +15

Damage Resistances

cold, lightning

Damage Immunities

acid, fire, poison; bludgeoning, piercing, and slashing from nonmagical attacks

Condition Immunities

charmed, exhaustion, frightened, poisoned

Senses

truesight 120 ft.

Languages

Abyssal, telepathy 120 ft.

Challenge

22

Proficiency Bonus

+7

Heat Regeneration

If the temperature around it is 100 degrees Fahrenheit or higher, Aurnozci regains 15 hit points at the start of its turn. If it takes cold or radiant damage, this trait doesn't function at the start of its next turn. Aurnozci dies only if it starts its turn with 0 hit points and doesn't regenerate.

Legendary Resistance (3/Day)

If Aurnozci fails a saving throw, it can choose to succeed instead.

Magic Resistance

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

Actions

Multiattack

Aurnozci makes one Bite attack and two Tail attacks.

Bite

Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 21 (2d12 + 8) slashing damage plus 9 (2d8) fire damage.

Tail

Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 17 (2d8 + 8) bludgeoning damage.

Mucus Spray (Recharge 5-6)

Aurnozci sprays mucus in a 60-foot cone. Each creature in that cone must make a DC 20 Dexterity saving throw, taking 42 (12d6) acid damage on a failed save, or half as much damage on a successful one.

Spellcasting

Aurnozci casts one of the following spells, requiring no material components and using Wisdom as the spellcasting ability (spell save DC 20): • At will: Detect Magic, Heat Metal (7th-level version) • 2/Day each: Darkness, Dispel Magic, Hold Person

Legendary actions

Legendary Actions (3/Turn)

Aurnozci can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. Aurnozci regains spent legendary actions at the start of its turn.

Move

Aurnozci moves up to its speed.

Tail

Aurnozci makes one Tail attack.

Cast a Spell (Costs 2 Actions)

Aurnozci uses Spellcasting.

Conflagration (Costs 2 Actions)

Flames momentarily surround Aurnozci. Each creature within 15 feet of Aurnozci must make a DC 20 Dexterity saving throw, taking 18 (4d8) fire damage on a failed save, or half as much damage on a successful one.