Gargantuan Swarm of Huge dragons, Chaotic Evil
Armor Class 19 (natural armor)
Hit Points 395 (71d12 + 85)
Speed 40 ft., Fly 80 ft., Swim 40 ft.
STR
23 (+6)
DEX
19 (+4)
CON
21 (+5)
INT
18 (+4)
WIS
26 (+8)
CHA
17 (+3)
Saving Throws DEX +12, CON +13, WIS +16, CHA +11
Skills Perception +11, Stealth +7
Damage Resistances All; All damage but Force, Radiant, and Psychic
Damage Immunities Acid; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks; Bludgeoning, Piercing, and Slashing from Metal Weapons
Condition Immunities Incapacitated, Prone, Restrained
Senses Darkvision 120 ft., Passive Perception 21
Languages Common, Draconic Draconic, Abyssal, Infernal, Celestial, Telepathy 60ft, Common
Challenge 25 (75,000 XP)
Proficiency Bonus +8
Traits

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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: +11 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 4 (1d8) acid damage.

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.

Frightful Presence. Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 16 Wisdom saving throw or become frightened 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. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.

Shadow Breath. Each creature must succeed a DC 17 Intelligence saving throw or take 56(2d12+14 necrotic) damage. If this attack puts a enemy down to 0 hp, a shadow rises from the corpse and then explodes dealing 32(1d6+4 necrotic) damage. Then the shadow is under the dragons control until de summoned or killed.

Acid Breath (Recharge 5–6). The dragon exhales acid in a 60-­foot line that is 5 feet wide. Each creature in that line must make a DC 18 Dexterity saving throw, taking 54 (12d8) acid damage on a failed save, or half as much damage on a successful one.

Blast of darkness.

Target creature this dragon can see must succeed a DC 18 wisdom saving throw or take 9(1d6)+5 necrotic damage. Target creature must also succeed a DC 15 intelligence and strength saving throw or be blinded and knocked prone for 5 turns.

 

 

 

Reactions

Phase.

Once every 5 turns, Azarthoth can roll a DC 12 wisdom check and if succeeded, take 0 damage and deal 5 necrotic damage.

 

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.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 19 Dexterity saving throw or take 13 (2d6 + 6) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Habitat: ForestMountainSwampUnderdark

AbiRei

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