Greater Ghast of Leng

Blood Frenzy. The greater ghast of Leng has advantage on melee attack rolls against any creature that doesn't have all its hp.

Command Ghasts of Leng. As a bonus action, the greater ghast of Leng commands a ghast of Leng within 30 feet of it to make one attack as a reaction against a creature the greater ghast attacked this round.

Keen Smell. The greater ghast of Leng has advantage on Wisdom (Perception) checks that rely on smell.

Sunlight Hypersensitivity. The greater ghast of Leng takes 20 radiant damage when it starts its turn in sunlight. While in sunlight, it has disadvantage on attack rolls and ability checks.

Multiattack. The greater ghast of Leng makes three attacks: one with its bite and two with its claws. If both claw attacks hit a Medium or smaller target, the target is grappled (escape DC 15). Until this grapple ends, the target is restrained, the greater ghast can automatically hit the target with its claws, and the greater ghast can't make claw attacks against other targets.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 8 (1d8 + 4) piercing damage plus 7 (2d6) necrotic damage.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 11 (2d6 + 4) slashing damage.