Armor Class 14
Hit Points 127 (15d10 + 45)
Speed 30 ft., fly 80 ft.
Skills Perception +4
Senses Darkvision 120 ft., passive Perception 14
Languages —
Challenge 6
Multiattack. The wyvern makes one Bite attack and one Sting attack.
Bite. m +7, reach 5 ft. Hit: 13 (2d8 + 4) Piercing damage.
Sting. m +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.
Monster Manual (2024), p. 337