Keen Sight and Smell. The owlbear has advantage on Wisdom (Perception) checks that rely on sight or smell.

Pack Tactics. The Abyssal Owlbear has advantage on an attack roll against a creature if at least one of the Abyssal Owlbear's allies is within 5 ft. of the creature and the ally isn't incapacitated.

Multiattack. The owlbear makes two attacks: two with its beak and one with its claws.

Beak. Melee Weapon Attack: +11 to hit, reach 5 ft., one creature. Hit: 22 (3d10 + 5) piercing damage.

Claws. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit:  23(4d8 + 5) necrotic damage.

Abyssal Shriek (Recharge 5-6). The Owlbear releases a horrid screeching sound. All non-aberrations within 50ft that can hear it must make a DC 17 Wisdom saving throw. On a failure, a creature takes 8d6 psychic damage and is frightened or half as much damage and is not frightened on a successful one.

Call Children (1/day) The Abyssal Owlbear cries a mournful moan. It summons two "Abyssal Owlbear Cubs" at any point within 15ft of itself.