Wyvern

Large Dragon, Unaligned

AC 14 Initiative +0 (10) HP 127 (15d10 + 45) Speed 30 ft., Fly 80 ft.
STR 19 +4 +4
DEX 10 +0 +0
CON 16 +3 +3
INT 5 −3 −3
WIS 12 +1 +1
CHA 6 −2 −2
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.