How about a spell that could backfire, but may also work spectacularly?
Battle of Whits
1st level enchantment
Casting Time: 1 action
Range: 100 feet
Components: V,S
Duration: 10 rounds
Choose a creature you can see, and choose either Wisdom, Intelligence, or Charisma. That creature and you both make saving throws of that chosen type. Whoever has the lower saving throw is Stunned for one round. The winner of the two saving throws repeats the process at the end of their turn until the duration of the spell ends.
Thoughts?
