Wyvern

Large dragon, unaligned

Armor class 13 (natural armor)
Hit points 110 (13d10 + 39)
Speed 20 ft., fly 80 ft.

STR	DEX	CON	INT	WIS	CHA
19(+4)	10(+0)	16(+3)	5(-3)	12(+1)	6(-2)

Skills Perception +4
Senses darkvision 60 ft., passive Perception 14
Languages —
Challenge 6 (2,300 XP)

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 weapon attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage.

Claws. Melee weapon attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Stinger. 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.