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?
Throat Punch Games 
That sounds different. That sounds almost like a battle between bards, clerics, or warlocks. I guess it would include wizards but don’t see that happening often. So it just stuns them at the end of their turn..? It could be a cheat in a contest or tournament too. Interesting.