19 (natural armor)
102 (12d10 + 36)
30 ft., fly 80 ft.
Perception +5, Stealth +7
darkvision 120 ft.
Draconic
7
The rock wyrm has advantage on attack rolls against any creature it has surprised.
The rock wyrm doesn't provoke opportunity attacks when it flies out of an enemy's reach.
The rock wyrm has advantage on Dexterity (Stealth) checks to hide in rocky terrain.
While in sunlight, the rock wyrm has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.
The rock wyrm makes two attacks: one with its bite and one with its claws.
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) piercing damage.
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.
The rock wyrm exhales steam in a 30-foot cone. Each creature in that area must make a DC 14 Constitution saving throw, taking 35 (10d6) fire damage on a failed save, or half as much on a successful one.