Armor Class 14 (natural armor)
Hit Points 38 (11d8 - 11)
Speed 30 ft., fly 40 ft.
Saving Throws DEX +5, INT +5
Skills Arcana +5, History +5, Insight +2, Perception +2, Religion +5
Senses truesight 120 ft., passive Perception 12
Languages all but rarely speaks
Challenge 2
Spectral Duplicate (Recharges after a Short or Long Rest). As a bonus action, the berbalang creates one spectral duplicate of itself in an unoccupied space it can see within 60 feet of it. While the duplicate exists, the berbalang is unconscious. A berbalang can have only one duplicate at a time. The duplicate disappears when it or the berbalang drops to 0 hit points or when the berbalang dismisses it (no action required). The duplicate has the same statistics and knowledge as the berbalang, and everything experienced by the duplicate is known by the berbalang. All damage dealt by the duplicate's attacks is psychic damage.
Multiattack. The berbalang makes two attacks: one with its bite and one with its claws.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 3) piercing damage.
Claws. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (2d4 + 3) slashing damage.
Mordenkainen's Tome of Foes, p. 120