Gynosphinx

The sphinx is immune to any effect that would sense amotions or read thoughts, as well as any divination spell that it refuses. Wisdom (Insight) checks made to ascertain the sphinx's intentions or sincerity have disadvantage.

The sphinx's weapon attacks are magical.

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. It 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