Wyvern

Large dragon · CR 6

Armor Class 13

Hit Points 110 (13d10+39)

Speed fly 80 ft., 20 ft.

STR 19 +4

DEX 10 +0

CON 16 +3

INT 5 -3

WIS 12 +1

CHA 6 -2

Skills perception +4

Senses darkvision60 ft. , passive Perception 14

Actions

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/Ranged Weapon Attack: +7 to hit.: Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage.
Claws. Melee/Ranged Weapon Attack: +7 to hit.: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.
Stinger. Melee/Ranged Weapon Attack: +7 to hit.: Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (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.