Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Spellcasting. The dragon casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 19):
At will: faerie fire
1/day each: calm emotions, invisibility, revivify
Multiattack. The dragon makes one Bite attack and two Claw attacks.
Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit:16 (2d10 + 5) piercing damage plus 7 (2d6) radiant damage.
Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit:12 (2d6 + 5) slashing damage.
Tail. Melee Weapon Attack: +10 to hit, reach 15 ft., one target. Hit:9 (1d8 + 5) bludgeoning damage. If the target is a creature, it must succeed on a DC 18 Strength saving throw or be knocked prone.
Breath Weapon (Recharge 5–6). The dragon uses one of the following breath weapons:
Tail. The dragon makes one Tail attack.
Cast a Spell (Costs 2 Actions). The dragon uses Spellcasting.
Ancient legends suggest that when the gods came to the First World and tried to populate it with their Humanoid followers, a clever dragon fled to the Feywild to hide a clutch of eggs. The magic of that faerie realm suffused the eggs, which hatched into the first moonstone dragons. Their descendants are now found throughout the Feywild.