Crowvern

Multiattack. The Crowvern 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:  Biting enemies with sharp teeth dealing piercing damage. Roll 1d20+5.

Claws. Melee Weapon Attack:  Slashing targets with sharp claws dealing slashing damage. Roll 1d20+5.

Stinger. Melee Weapon Attack: Piercing enemies with its tail stinger filled with deadly venom. Roll 1d20+5, the target gets poisoned for 5 turns and takes 3 damage per turn.

Wing Blast. Elemental Attack: Blowing a gust of wind with a beat of its wings. Roll 2d8+5, knocking target/targets back 5ft

Feather Shot. Ranged Weapon Attack: Flinging feathers from its neck, wings, and tail. Roll 12d6+5, dealing piercing and slashing damage to target/targets. Shields may nullify the attack. 

Wyvern Warcry. An ear-shattering roar that prevents all avian and or draconic creatures from being charmed and frightened, while gaining a 1d6 inspiration die for all actions.