Astral Owlbear

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

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

Beak. Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 17 (2d10 + 6) piercing damage.

Claws. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 15 (2d8 + 6) slashing damage.

Wings. The owlbear beats its wings. Each creature within 15 feet of the owlbear must succeed on a DC 18 Dexterity saving throw or take 19 (3d8 + 6) bludgeoning damage and be pushed back 15 feet, or half as much damage on a success and not be pushed back.

Hoot. The owlbear lets out an astral hoot. Each creature within 40 feet much make a DC 16 Wisdom saving throw or take 13 (2d8 + 4) psychic damage and is paralyzed until the end of their next turn. If a creature's saving throw is successful, they take half damage, are not paralyzed, and are immune to the effect (but not the damage) of any future hoots for 24 hours.

Heave. After taking damage from a melee weapon attack, the owlbear shift its weight, heaving in retaliation against the attacker. 
+9 to hit, reach 5 ft., one creature. Hit: 15 (2d8 + 6) bludgeoning damage.