Adult Cave Dragon — fantasy monster illustration. Adult Cave Dragon is a huge dragon (Challenge Rating 19).

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Adult Cave Dragon

Huge Dragon, Neutral Evil

AC
18
HP
270
Speed
40
CR
19

False


Armor Class 18 (natural armor)

Hit Points 270 (20d12 + 140)

Speed 40 ft., burrow 40 ft.


STR
27 (+8)
DEX
12 (+1)
CON
25 (+7)
INT
12 (+1)
WIS
14 (+2)
CHA
16 (+3)

Saving Throws Cha +9, Con +13, Dex +7, Wis +8

Skills Stealth +7, Perception +14

Damage Vulnerabilities False

Damage Resistances False

Damage Immunities poison

Condition Immunities blinded, poisoned

Senses blindsight 60 ft., tremorsense 120 ft., passive Perception 24

Languages Common, Darakhul, Draconic

Challenge 19


Traits

Darkness Aura. The cave dragon emits magical darkness in a 30-foot radius around it. The darkness moves with the dragon and spreads around corners. Darkvision can't penetrate this darkness, and no natural light can illuminate it. If any of the darkness overlaps with an area of light created by a spell of 3rd level or lower, the spell creating the light is dispelled. At the start of each of its turns, the dragon chooses whether this aura is active. A successful dispel magic (DC 14) cast on the dragon suppresses this aura for 1 minute.

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

Magical Tunneler. The cave dragon can burrow through nonmagical unworked earth and stone. While doing so, the dragon can choose whether to leave the material it moves through undisturbed or leave a 10-foot diameter tunnel in its wake.

Spiked Climb. The dragon uses its spikes to hold itself in place while climbing, allowing it to climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. If it climbs upside down on a ceiling or suspends itself on a vertical surface while leaving its claws free, it can't use the Ruff Spikes reaction.

Actions

Multiattack. The dragon uses its Frightful Presence. It then makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 19 (2d10 + 8) piercing damage plus 10 (3d6) poison damage.

Claw. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 15 (2d6 + 8) slashing damage.

Tail. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 17 (2d8 + 8) 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 17 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.

Poison Breath (Recharge 5-6). The dragon exhales a cone of black, poisonous gas in a 60-foot cone. Each target in that area must make a DC 21 Constitution saving throw. On a failure, a creature takes 56 (16d6) poison damage and is poisoned until it finishes a short rest. A creature can repeat the saving throw at the end of each hour, ending the effect on itself on a success.

Reactions

Ruff Spikes. When a creature moves to a space within 5 feet of the cave dragon, the dragon flares its many feelers and spikes. The creature must succeed on a DC 21 Dexterity saving throw or take 9 (2d8) piercing damage and be prevented from entering that space.

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.

Limb Sweep (Costs 2 Actions). The dragon sweeps its wingless limbs outward. Each creature within 10 feet of the dragon must succeed on a DC 21 Dexterity saving throw or take 15 (2d6 + 8) bludgeoning damage and be pushed up to 10 feet away from the dragon and knocked prone.

Community Images

Adult Cave Dragon — fantasy monster illustrationPrimary
FTTHelper · auto-generated · monster · monster

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Further reading

Jetpack7 Game Master Series
The Game Master's Book of Legendary Dragons
Aaron Hübrich · 2022
The Game Master's Book of Random Encounters
Jeff Ashworth · 2020
The Game Master's Book of Traps, Puzzles and Dungeons
Jeff Ashworth · 2022