Gargantuan unknown, Neutral Evil
Armor Class 123 (natural armor)
Hit Points 195 (21d12 + 95)
Speed 40 ft., Fly 80 ft., Swim 40 ft.
STR
29 (+9)
DEX
14 (+2)
CON
21 (+5)
INT
1 (-5)
WIS
24 (+7)
CHA
1 (-5)
Saving Throws DEX +10, CON +13, WIS +15, CHA +3
Skills Perception +11, Stealth +7
Damage Immunities Acid, Piercing
Condition Immunities Blinded, Deafened
Senses Blindsight 60 ft., Darkvision 120 ft., Tremorsense 80 ft, Passive Perception 24
Languages Common, Draconic Crystalized
Challenge 28 (120,000 XP)
Proficiency Bonus +8
Traits

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 22 (4d6 + 8) piercing damage and the target is grappled if it is large or smaller. While a target is grappled in this way, the dragon cannot make bite attacks against other targets

Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Tail. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage.

Crystal Breath (Recharge 5–6). The dragon exhales crystal shard in a 60-­foot line that is 20 feet wide. Each creature in that line must make a DC 19 Dexterity saving throw, taking 54 (10d10) Parasite damage on a failed save, or half as much damage on a successful one.

Legendary Actions

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

Detect. The dragon makes a Wisdom (Perception) check.

Tail Attack. The dragon makes a tail attack.

Swallow. The dragon attempts to swallow a creature grappled by its bite attack. The creature must succeed on a DC 26 Dexterity saving throw or be swallowed by the dragon. A swallowed creature is blinded and restrained, and it has total cover against attacks and other effects outside the dragon.  At the start of each of its turns, a swallowed creature must make a DC 19 Dexterity saving throw. On a failed save, it takes 21 (6d6) acid damage. On passed save, it takes half as much damage.

If the dragon takes 30 damage or more on a single turn from a creature inside it, the dragon must succeed on a DC 15 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of the dragon. It can choose to fail this save instead of rolling. If the dragon dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 20 feet of movement, exiting prone.

Monster Tags: monstrosity

Habitat: UnderdarkUnderwater

HyvenTheDwarf

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