Ancient Moonstone Dragon

Gargantuan dragon, typically neutral

Armor Class

20 (natural armor)

Hit Points

330 (20d20 + 120)

Speed

walk 40 ft., fly 80 ft.

Saves

Int +12, Wis +13, Cha +15

Skills

Perception +13, Persuasion +15, Stealth +11

Condition Immunities

charmed

Senses

truesight 120 ft.

Languages

All, Telepathy 120 ft.

Challenge

21

Proficiency Bonus

+7

Legendary Resistance (3/Day)

If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack

The dragon makes one Bite attack and two Claw attacks.

Bite

Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 11 (2d10) radiant damage.

Claw

Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Tail

Melee Weapon Attack: +13 to hit, reach 20 ft., one target. Hit: 10 (1d8 + 6) bludgeoning damage. If the target is a creature, it must succeed on a DC 21 Strength saving throw or be knocked prone.

Breath Weapon (Recharge 5-6)

The dragon uses one of the following breath weapons: Dream Breath. The dragon exhales mist in a 90-foot cone. Each creature in that area must succeed on a DC 21 Constitution saving throw or fall unconscious for 10 minutes. This effect ends for a creature if the creature takes damage or someone uses an action to wake it. Moonlight Breath. The dragon exhales a beam of moonlight in a 120-foot line that is 10 feet wide. Each creature in that area must make a DC 21 Dexterity saving throw, taking 60 (11d10) radiant damage on a failed save, or half as much damage on a successful one.

Spellcasting

The dragon casts one of the following spells, requiring no spell components and using Charisma as the spellcasting ability (spell save DC 23): • At will: faerie fire • 2/Day each: calm emotions, dispel magic, invisibility, revivify

Legendary actions

Legendary Actions (3/Turn)

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.

Tail

The dragon makes one Tail attack.

Cast a Spell (Costs 2 Actions)

The dragon uses Spellcasting.