Black Exhalation

You exhale a 30-foot cone of deadly spores. Each creature in the cone must make a Constitution saving throw. On a failed save, the creature takes 6d6 poison damage and loses 1d3 points of Intelligence. On a successful save, the creature takes half damage and loses no Intelligence.

A creature that loses Intelligence because of black exhalation must repeat the saving throw at the end of each of its turns. If the saving throw fails, it loses an additional point of Intelligence; if the save succeeds, the spell effect ends. Intelligence loss is permanent until restored by the greater restoration spell or comparable magic.