Brainrot

You project necromantic magic into the mind of a creature in range, eating away at its brain. The target makes a Constitution saving throw. On a failed save, it takes 1d10 necrotic damage and subtracts 1d4 from the next Intelligence, Wisdom, or Charisma ability check it makes in the next minute.

This spell’s damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).