Inscrutable. The sphinx is immune to any effect that would sense its emotions or read its thoughts, as well as any divination spell that it refuses. Wisdom (Insight) checks made to ascertain the sphinx's intentions or sincerity have disadvantage.
Magic Weapons. The sphinx's weapon attacks are magical.
Spellcasting. The sphinx is a 9th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 16, +8 to hit with spell attacks). It requires no material components to cast its spells. The sphinx has the following wizard spells prepared:
Cantrips (at will): mage hand, minor illusion, prestidigitation
1st level (4 slots): detect magic, identify, shield
2nd level (3 slots): darkness, locate object, suggestion
3rd level (3 slots): dispel magic, remove curse, tongues
4th level (3 slots): banishment, greater invisibility
5th level (1 slot): legend lore
Multiattack. The sphinx makes two claw attacks.
Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit:13 (2d8 + 4) slashing damage.
Claw Attack. The sphinx makes one claw attack.
Teleport (Costs 2 Actions). The sphinx magically teleports, along with any equipment it is wearing or carrying, up to 120 feet to an unoccupied space it can see.
Cast a Spell (Costs 3 Actions). The sphinx casts a spell from its list of prepared spells, using a spell slot as normal.
In sacred isolation, a sphinx guards the secrets and treasures of the gods. As it calmly regards each new party that comes before it, the bones of supplicants and quest seekers that failed to pass its tests lie scattered around its lair. Its great wings sweep along its flanks, its tawny leonine body rippling with muscle and possessed of forepaws powerful enough to tear a humanoid in half.