Artic Bane (Druidic Variant)

Flyby. The Artic Bane doesn't provoke opportunity attacks when it flies out of an enemies reach.

Evasion. If the Artic Bane makes a Dexterity Saving Throw, it takes half damage on a failed save and no damage on a successful save.

Silent Wings. The flight of the Artic Bane is especially silent and difficult to notice. It has Advantage on Stealth rolls while flying (in Artic environments).

Keen Senses. The Artic Bane has Advantage on Perception checks that rely on hearing and smell.

Stalker. If the Artic Bane surprises its target with a Bite attack. If the target is of size Medium or smaller, the target must succeed a DC 13 Strength Saving Throw or become Grappled.

Snow Camouflage. The Artic Bane has Advantage on Stealth checks made to hide in snowy terrain.

Spellcasting. The Artic Bane is a 15th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 17, +7 to hit with spell attacks). The Artic Bane has following Druid spells prepared:
Cantrips (at will): Poison Spray, Mold Earth, Shape Water, Thorn Whip 
1st level (4 slots): Create or Destroy Water, Cure Wounds, Healing Word, Detect Poison and Disease, Purify Food and Water                                                                                              2nd level (3 slots): Lesser Restoration, Locate Animals or Plants, Pass Without Trace      3rd level (3 slots): Call Lighting, Tidal Wave, Wind Wall                                                            4th level (3 slots): Blight, Dominate Beast, Stone Skin                                                              5th level (2 slots): Mass Cure Wounds                                                                                        6th level (1 slot): Heal, Transport via Plants                                                                              7th level (1 slot): Fire Storm, Regenerate                                                                                      8th level (1 slot): Earthquake

MultiAttack. The Artic Bane makes three attacks: One with its Bite, Two with its Claws

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit: 16 (3d10 + 3) Piercing damage. 

Claws. Melee Weapon Attack: +8 to hit, reach 5 ft., 1target. Hit: 13 (4d6 + 3) Slashing damage.

Forceful Gale (Recharge 5-6). 60ft Cone. Each creature in the cone must make a DC 16 Strength Saving Throw. On a failed save, a creature takes 45 (9D8) Bludgeoning damage, is pushed 20ft away from the Artic Bane and is knocked Prone. On a success, a creature takes half damage, isn't pushed and isn't knocked Prone.

Cold Breath (Recharge 5-6). 20ft Cone. Each creature in the area must make a DC 19 Dexterity Saving Throw. On a failed save, a creature takes 55 (11D8) Cold damage. Half as much on a successful save.