Colter's Insightful Eyes

This spell causes the casters eyes to give off a dim glow and grants advantage on perception, insight and investigation checks during the duration of the spell. 

Once during the duration of this spell you can choose a single creature you can see. That creature makes a wisdom saving throw ,on a failed save the caster knows one of the creatures ability scores. On a successful save the creature is immune to this effect for 24 hours.