Ancient Sapphire Dragon

Gargantuan dragon, neutral

Armor Class

23 (natural armor)

Hit Points

350 (28d20 + 56)

Speed

40 ft., fly 80 ft. (hover)

STR

24 (+7)

DEX

27 (+8)

CON

14 (+2)

INT

26 (+8)

WIS

19 (+4)

CHA

24 (+7)

Damage Immunities

fire, lightning

Damage Resistances

bludgeoning, slashing, and piercing from nonmagical attacks

Damage Vulnerabilities

psychic

Condition Immunities

stunned

Senses

blindsight 60 ft., darkvision 120 ft., passive Perception 28

Saving Throws

Dex +15, Int +15, Wis +11, Cha +14

Skills

Arcana +15, Insight +11, Perception +11, Religion +15

Languages

Common, Draconic, telepathy 120 ft.

Challenge

24 (62,000 XP)

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

Awe Aura. All creatures within 30 feet must make a DC 22 Charisma saving throw in order to attack this dragon. On a failed save, the attacking creature’s turn ends immediately. On a success, that creature is immune to the Awe Aura of all gemstone dragons for 1 week.

Psionics

Charges: 28

Recharge: 1d10

Fracture: 35

Actions

Multiattack. The dragon 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: 18 (2d10 + 7) piercing damage.

Claw. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 14 (2d6 + 7) slashing damage.

Tail. Melee Weapon Attack: +14 to hit; reach 20 ft., one target. Hit: 16 (2d8 + 7) bludgeoning damage.

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.

Psionics. The dragon uses a psionic ability.

Psionic Shift (Costs 2 Actions). The dragon releases a wave of telekinetic energy from its mind. Every creature within 15 feet must make a DC 24 Intelligence saving throw or take 15 (2d6 + 8) force damage and be knocked prone. The dragon then can move up to half its movement speed.

Lair Actions

On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects. The dragon can’t use the same effect two rounds in a row.

The dragon manifests flay in a 120-foot cone, doing 1d6 damage per charge spent.
The dragon manifests reflection at no cost. It cannot use this action again for a week.
The dragon casts plane shift with DC 22.

Regional Effects

Intelligent creatures who sleep within 12 miles of a sapphire dragon’s lair dream of the past and future. They know the things they see in these dreams are real events that have, or will, occur.