Sources
CR
Type
Size
Alignment
Movement

Reduced-Threat Wyvern

Large Dragon, Unaligned

Armor Class 13 (natural armor)
Hit Points 110 (13d10 + 39)
Speed 20 ft., fly 80 ft.
STR
19
+4
DEX
10
+0
CON
16
+3
INT
5
-3
WIS
12
+1
CHA
6
-2
Skills Perception +4
Senses darkvision 60 ft., passive Perception 14
Languages
Challenge 6 (2,300 XP)

Traits

Reduced Threat. A reduced-threat monster takes a −2 penalty on attack rolls (included in the stat block), ability checks (included in the stat block for skill proficiencies), saving throws (included in the stat block for saving throw proficiencies), and saving throw DCs (included in the stat block).

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.