Ancient Shadow Wyrmling

AC 17 - HP 123 - 30 ft., burrow 15 ft., fly 60 ft.
Resistance: necrotic, psychic
Immunities: poison, frightened, poisoned
Shadow Stealth: While in dim light or darkness, Hide action as a bonus action.
Sunlight Sensitivity: While in sunlight, disadvantage on attack rolls, as well as on Wisdom (Perception) checks.