- Armor Class :20 (Natural Armor)
- Hit Points: 297 (17d20 + 119)
- Speed: 40 ft., burrow 40 ft., fly 80 ft.
- Saving Throws: DEX +6, CON +13, WIS +8, CHA +10
- Skills: History +9, Perception +14, Persuasion +10, Stealth +6
- Damage Immunities: Fire
- Senses: Blindsight 60 ft., Darkvision 120 ft., Passive Perception 24
- Languages: Common, Draconic
- Challenge: 20 (25,000 XP)
- Proficiency Bonus: +6
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: 19 (2d10 + 8) piercing damage.
- Claw. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 15 (2d6 + 8) slashing damage.
- Tail. Melee Weapon Attack: +14 to hit, reach 20 ft., one target. Hit: 17 (2d8 + 8) bludgeoning damage.
Legendary Actions
- Detect: The dragon makes a Wisdom (Perception) check.
- Tail Attack: The dragon makes a tail attack.
| STR | DEX | CON | INT | WIS | CHA |
| 27 (+8) | 10 (+0) | 25 (+7) | 16 (+3) | 15 (+2) | 19 (+4) |
Attributes
| AC | 20 (Natural Armor) |
| Alignment | Chaotic Good |
| CHA | 19 |
| CON | 25 |
| Challenge Rating | 20 |
| DEX | 10 |
| HP | 297 (17d20+119) |
| INT | 16 |
| Immunities | Fire |
| Languages | Common, Draconic |
| Passive Perception | 24 |
| Roll 0 | Bite 1d20 + 14 2d10+8 |
| Roll 1 | Claw 1d20 + 14 2d6+8 |
| Roll 2 | Tail 1d20 + 14 2d8+8 |
| Roll 3 | Fire Breath 1d20 + 0 16d6 |
| STR | 27 |
| Saving Throws | Dex +6, Con +13, Wis +8, Cha +10 |
| Senses | Blindsight 60 Ft., Darkvision 120 Ft. |
| Size | Gargantuan |
| Skills | History +9, Perception +14, Persuasion +10, Stealth +6 |
| Speed | 40 ft., burrow 40 ft., fly 80 ft. |
| Type | dragon |
| WIS | 15 |