Ancient Moonstone Dragon

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

The dragon makes one Bite attack and two Claw attacks.

Melee Weapon Attack +13 to hit, reach 15 ft., one target. 17 (🎲2d10 + 6) 🏹 Piercing damage plus 11 (🎲2d10) ☀️ Radiant damage.

Melee Weapon Attack +13 to hit, reach 10 ft., one target. 13 (🎲2d6 + 6) 🗡️ Slashing damage.

Melee Weapon Attack +13 to hit, reach 20 ft., one target. 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.

The dragon uses one of the following breath weapons:
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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.
item
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.

The dragon makes one Tail attack.

The dragon uses Spellcasting.