Enrage: When the Cryofreeze Wyvern is reduced to below half its hit point maximum, it becomes enraged. When the Cryofreeze Wyvern first becomes enraged, it regains a use of Chillwind Blast and Blizzard Sweep.
Legendary Resistance(3/day): If the Cryofreeze Wyvern fails a saving throw, it can choose to succeed instead.
Rimed Hide: When a creature hits the Cryofreeze Wyvern with a melee attack while within 5ft of it, that creature takes 7(2d6) cold damage. If the Cryofreeze Wyvern is enraged, the creature takes 14(4d6) cold damage instead.
Multiattack: The Cryofreeze Wyvern makes three attacks, one with its Bite and two with its Talons.
Bite: Melee weapon attack, +10 to hit, reach 10ft, one target. Hit 18(2d12+5) piercing damage, plus 14(4d6) cold damage if the Cryofreeze Wyvern is enraged.
Talons: Melee weapon attack, +10 to hit, reach 5ft, one target. Hit 12(2d6+5) slashing damage, plus 14(4d6) cold damage if the Cryofreeze Wyvern is enraged.
Tail: Melee weapon attack, +10 to hit, reach 15ft, one target. Hit 14(2d8+5) bludgeoning damage, plus 14(4d6) cold damage if the Cryofreeze Wyvern is enraged, and the target must succeed on a DC 17 Strength saving throw or be knocked Prone.
Chillwind Blast(Recharge 5-6): The Cryofreeze Wyvern unleashes a blast of freezing wind in a 60ft cone. Each creature in that area must make a DC 17 Dexterity saving throw, taking 42(12d6) cold damage on a failed save, and half as much damage on a successful one. If a target fails its saving throw, it also contracts Deadly Frostbite. While this disease is contracted, a target has its speed reduced by half, it cannot Dash, and it can choose to take either a bonus action or an action on its turn, not both.
The Cryofreeze Wyvern can take 3 legendary actions, choosing from the options below(5 while enraged). Only one legendary action can be used at a time and only at the end of another creature's turn. The Cryofreeze Wyvern regains spent legendary actions at the start of its turn.
Tail Attack: The Cryofreeze Wyvern makes a Tail attack.
Blizzard Sweep(Cost 2 Actions): The Cryofreeze Wyvern flaps its wings. Creatures within 15ft of the Cryofreeze Wyvern must make a DC 17 Dexterity saving throw, taking 21(6d6) cold damage and being pushed 20ft away from the Cryofreeze Wyvern and contracting Deadly Frostbite on a failed save, and half as much damage and suffer no ill effects on a successful one.
Winter's Winds(Cost 3 Actions): The Cryofreeze Wyvern moves up to half its flying speed and uses its Chillwind Blast, if able.
Description
Cryofreeze Wyverns are similar to Winter Wyverns, only they are much larger and more streamlined, making flying through the chilled air of the Icect Wastelands look like a needle through the water. They are typically midnight blue in color with streams of ice running down their stomachs and backs, but not their head or wings. Although they are classed as wyverns, they have a vastly underdeveloped stinger at the tip of their tail, instead channeling their highly developed venom into their wings. When a Cryofreeze Wyvern flaps its wings, toxic particles are released into that stream of chilled air, causing its venom to infect prey. The disease known as Deadly Frostbite reduces the prey's ability to run away, allowing for an easy kill. Cryofarx & Nefelus have a Cryofreeze Wyvern as a pet, although they are similar in size, called Shriek.
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