Magic resistance: The Frost Wyvern advantage on saving throws against spells and other magical effects.
Multiattack. The wyvern makes two attacks: one with its bite and one with its stinger . While flying, it can use its claws in place of one other attack.
Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 1 1 (2d6 + 4) piercing damage.
Claws. Melee Weapon Attack: +7 to hit, reach 5ft., one
target. Hit: 13 (2d8 + 4) slashing damage.
Stinger. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 1 1 (2d6 + 4) piercing damage. The target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one