Adult Storm Dragon

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +19 to hit, reach 10 ft., one target. Hit: 37 (7d10 + 6) piercing damage.

Claw. Melee Weapon Attack: +19 to hit, reach 5 ft., one target. Hit: 23 (3d12 + 6) slashing damage.

Wing Beat. The dragon flaps its wings so hard every creature in a 30-foot sphere around it must make a DC 19 DEX saving throw or take 43[rollable](4d20+5) force damage and be launched 20 feet

Breath Weapons (Recharge 5–6). The dragon uses one of the following breath weapons.

Blizard Breath. The dragon exhales an icy blast in a 70-foot cone. Each creature in that area must make a DC 17 Constitution saving throw, taking 64 (13d8) cold damage on a failed save, or half as much damage on a successful one.

Storm Breath. The dragon exhales a bolt of lightning that seems to split the sky in a 5-foot thick 100-foot long line. Each creature must make a DC 21 CON saving throw or take 40[rollable](8d10)lightning damage and 3d12 aditional lightning damage every turn until they make the saving throw.

Paralyzing Breath. The dragon exhales paralyzing gas in a 30-foot cone. Each creature in that area must succeed on a DC 19 Constitution saving throw or be paralyzed for 3 minutes. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Terrifying Roar.  The dragon unleashes a roar of epic fury. All creatures in hearing range are frightened.

Hurricane. A storm envelopes this dragon in a 90-foot sphere. Any creatures in the sphere (except for the dragon ) must make DC 20 DEX and STR saving throws with disadvantage every turn they spend in it or take or take 2d12 force 4d20 lightning and be flung fifty feet. All rolls in this sphere are made with disadvantage and the blinded condition except for those made by the dragon who has advantage on rolls made in the sphere and is not blinded.