Wyvern

Large Dragon, Unaligned

AC 14 Initiative +0 (10)
HP 127 (15d10 + 45)
Speed 30 ft., Fly 80 ft.

Skills Perception +4
Senses Darkvision 120 ft.; Passive Perception 14
Languages None
CR 6 (XP 2,300; PB +3)

Actions

Multiattack. The wyvern makes one Bite attack and one Sting attack.

Bite. Melee Attack Roll: +7, reach 5 ft. Hit: 13 (2d8 + 4) Piercing damage.

Sting. Melee Attack Roll: +7, reach 10 ft. Hit: 11 (2d6 + 4) Piercing damage plus 24 (7d6) Poison damage, and the target has the Poisoned condition until the start of the wyvern’s next turn.