Actions

Multiattack: The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws. Bite: Melee Weapon Attack: +17 to hit, reach 15 ft., one target. Hit: 21 (2d10 + 10) piercing damage.   Claw: Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 17 (2d6 + 10) slashing damage.   Tail: Melee Weapon Attack: +17 to hit, reach 20 ft., one target. Hit: 19 (2d8 + 10) bludgeoning damage.   Frightful Presence: Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 21 Wisdom saving throw or become frightened for 1 minute. 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 dragon's Frightful Presence for the next 24 hours.

Legendary Actions

Wing attack(loses movement but either lands or becomes airborne) The creature beats its wings, and each creature in the range must make a DC 25 Dexterity saving throw or take 2d6+10 damage and be knocked prone.

Lair Actions

collapse - dealing 2d4 falling damage - range 10ft disorienting dust - causes an entity court in its range to lose a turn - range 30ft of the Sylveria

In the forest of Drecoia, there is a large burned section of trees that is home to Sylveria.