Elder Onyx Dragon
Elder onyxes keep the history of a line that was nearly wiped out. Their Void Roar ends spells that require concentration and breaks earthen walls, and few have been seen above ground in living memory.
- Physiology
- Draconian
- Size
- Gargantuan
- Speed
- 40 ft., fly 80 ft., burrow 30 ft.
- Armor class
- 22 (ancient scale)
- Hit points
- 331 (17d20 + 153)
- Proficiency
- +6
- STR 30 +10 save +10
- DEX 10 +0 save +6
- CON 29 +9 save +15
- INT 18 +4 save +4
- WIS 15 +2 save +8
- CHA 21 +5 save +11
- Skills
- Perception +8 , Stealth +6 , Athletics +16
- Passive Perception
- 18
- 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 19, spell attack +11 .
Works Earth-Rifting through the tunnels of its hold, and uses it to close exits.
Traits
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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.
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Legendary Resistance
Three times 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, two Claw attacks and one Tail attack.
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Bite
+16 to hit · reach 15 ft.
2d12 + 10 piercing damage
A bite from the dragon's jaws.
-
Claw
+16 to hit · reach 10 ft.
2d8 + 10 slashing damage
A claw strike from the dragon's forelimb.
-
Tail
+16 to hit · reach 20 ft.
2d10 + 10 bludgeoning damage
A strike from the dragon's tail.
-
Ichor Breath
DC 23 Dexterity save
The dragon exhales in a 90-foot line 5 feet wide. Each creature in it makes a Dexterity saving throw, taking 23d6 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.
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Void Roar
DC 23 Constitution save
Each creature within 60 feet makes a Constitution saving throw or is Stunned until the end of its next turn. Every spell within 60 feet that requires concentration ends, and stone and earthen structures in the area take 6d10 thunder damage. Recharges after a short rest.
-
Wing Attack Legendary
DC 24 Dexterity save
The dragon beats its wings. Each creature within 15 feet makes a Dexterity saving throw, taking 2d6 + 10 bludgeoning damage and falling Prone on a failure. The dragon then flies up to half its speed.
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Channel Legendary
The dragon casts one of its at-will spells. This costs two legendary actions.