Multiattack

The sphinx makes one Beak attack and two Claw attacks. If both Claw attacks hit one creature, the target must succeed on a DC 18 Strength saving throw or take 14 (4d6) slashing damage and be knocked prone.

Beak

Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 10 (1d10 + 5) piercing damage.

Claw

Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 19 (4d6 + 5) slashing damage.

Carrion Breath (Recharge 5-6)

The gypsosphinx exhales rotting breath in a 30-foot cone. Each creature in the area must make a DC 18 Constitution saving throw. On a failure, a creature takes 21 (6d6) poison damage and 27 (6d8) necrotic damage and is poisoned for 1 minute. On a success, a creature takes half the damage and isn't poisoned. While poisoned in this way, a creature has disadvantage on death saving throws. A poisoned creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Spellcasting

The sphinx casts one of the following spells, requiring no material components and using Intelligence as the spellcasting ability (spell save DC 17): At will: comprehend languages, detect magic, mage hand 3/day each: blur, dispel magic, locate object 1/day each: major image, greater invisibility