Adult Onyx Dragon
An adult onyx spits a torrent of black acidic ichor that clings like tar and melts stone. Miners fear them and druidic cults revere them. The brood beneath the Onyx Mountains is the last one known.
- Physiology
- Draconian
- Size
- Giant
- Speed
- 40 ft., fly 80 ft., burrow 30 ft.
- Armor class
- 20 (dragon scale)
- Hit points
- 229 (17d12 + 119)
- Proficiency
- +5
- STR 27 +8 save +8
- DEX 10 +0 save +5
- CON 25 +7 save +12
- INT 16 +3 save +3
- WIS 13 +1 save +6
- CHA 19 +4 save +9
- Skills
- Perception +6 , Stealth +5 , Athletics +13
- Passive Perception
- 16
- Senses
- blindsight 60 ft., darkvision 120 ft., tremorsense 120 ft.
- Languages
- Common, Draconic, Old Valar
- Damage resistances
- fire, lightning, force
- Damage immunities
- acid
- Found in
- Subterranean
Spells
Channels with CHA. Save DC 17, spell attack +9 .
Works Earth-Rifting through the tunnels of its hold, and uses it to close exits.
Traits
-
Frightful Presence
Each hostile creature within 60 feet that can see the dragon makes a Wisdom saving throw against its save DC or is Frightened for 1 minute.
-
Legendary Resistance
Twice per day, when it fails a saving throw, it may choose to succeed instead.
-
Deep Sense
The dragon cannot be surprised while it is touching stone.
Actions
-
Multiattack
The dragon uses Frightful Presence, then makes one Bite attack and two Claw attacks.
-
Bite
+13 to hit · reach 10 ft.
2d10 + 8 piercing damage
A bite from the dragon's jaws.
-
Claw
+13 to hit · reach 5 ft.
2d6 + 8 slashing damage
A claw strike from the dragon's forelimb.
-
Tail
+13 to hit · reach 15 ft.
2d8 + 8 bludgeoning damage
A strike from the dragon's tail.
-
Ichor Breath
DC 20 Dexterity save
The dragon exhales in a 60-foot line 5 feet wide. Each creature in it makes a Dexterity saving throw, taking 17d6 acid damage on a failure and half as much on a success. The ichor clings, and a creature that fails takes the same damage again at the end of its next turn. Recharges on a roll of 5 or 6 on a d6 at the start of the dragon's turn.
-
Wing Attack Legendary
DC 21 Dexterity save
The dragon beats its wings. Each creature within 15 feet makes a Dexterity saving throw, taking 2d6 + 8 bludgeoning damage and falling Prone on a failure. The dragon then flies up to half its speed.