Sphinx of Secrets

Traits

Inscrutable. No magic can observe the sphinx remotely or detect its thoughts without its permission. Wisdom (Insight) checks made to ascertain its intentions or sincerity are made with Disadvantage.

Magic Resistance. The sphinx has Advantage on saving throws against spells and other magical effects.

Actions

Multiattack. The sphinx makes three Claw attacks. It can replace one attack with a use of Curse of the Riddle.

Claw. Melee Attack Roll: +7, reach 5 ft. Hit: 13 (2d8 + 4) Slashing damage plus 7 (2d6) Radiant damage.

Curse of the Riddle. int 15, one creature the sphinx can see within 60 feet. Failure: 21 (6d6) Psychic damage, and the target is cursed with a riddle. The cursed target has Disadvantage on ability checks and attack rolls. In addition, if it takes the Magic action, it must succeed on a 15 Intelligence saving throw or that action is wasted. The cursed target can take a Study action to make a 15 Intelligence check, solving the riddle and ending the curse on a success. The curse ends early if the sphinx curses another target.