Dexterity +9, Constitution +16, Wisdom +10, Charisma +16
Insight +10, Perception +17, Persuasion +16, Stealth +9
Blindsight 60 ft, Darkvision 120 ft
Common, Draconic
Fire
Traits
Amphibious
The Ancient Gold Dragon can breathe air and water.
Legendary Resistance
If the Ancient Gold Dragon fails a saving throw, it can choose to succeed instead.
Legendary Actions
Actions
Multiattack
The Ancient Gold Dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
Bite
+17 to hit, range 15 ft. Hit: 21 (2d10 + 10) piercing damage.
Claw
+17 to hit, range 10 ft. Hit: 17 (2d6 + 10) damage.
Frightful Presence
Each creature of the Ancient Gold Dragon's choice that is within of the dragon and aware of it must succeed on a saving throw or become frightened for . 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 Ancient Gold Dragon's for the next 24 hours.
Tail
+17 to hit, range 15 ft. Hit: 19 (2d8 + 10) bludgeoning damage.
Breath Weapons
The Ancient Gold Dragon uses one of the following breath weapons. Fire Breath. The Ancient Gold Dragon exhales fire in a . Each creature in that area must make a saving throw, taking damage on a failed save, or half as much damage on a successful one. Weakening Breath. The Ancient Gold Dragon exhales gas in a . Each creature in that area must succeed on a saving throw or have disadvantage on Strength-based attack rolls, Strength checks, and Strength saving throws for . A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
Change Shape
The Ancient Gold Dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into its true form. It reverts to its true form if it dies. Any equipment it is wearing or carrying is absorbed or borne by the new form (the Ancient Gold Dragon's choice). In a new form, the Ancient Gold Dragon retains its alignment, hit points, Hit Dice, ability to speak, proficiencies, Legendary Resistance, lair actions, and Intelligence, Wisdom, and Charisma scores, as well as this action. Its statistics and capabilities are otherwise replaced by those of the new form, except any class features or legendary actions of that form.
Legendary Actions
Tail Attack
The Ancient Gold Dragon makes a tail attack.
Wing Attack
The Ancient Gold Dragon beats its wings. Each creature within of the Ancient Gold Dragon must succeed on a saving throw or take damage and be knocked prone. The Ancient Gold Dragon can then fly up to half its flying speed.
Detect
The Ancient Gold Dragon makes a Wisdom (Perception) check.