Witchhunter

General Feat (Prerequisite: Level 4+)

You gain the following benefits.

Ability Score Increase. Increase your Strength or Dexterity score by 1, to a maximum of 20.

Inquisitor. As a Bonus Action, you can detect the residual magics indicative of spellcasting ability. For the next 10 minutes or until you have the Incapacitated condition, you know the number of creatures with such capability within 120 feet of yourself (but not their precise locations.)

Malleus Maleficarum. Add your proficiency bonus for any weapon or unarmed attack and damage rolls made against a target with a spellcasting feature.  If you are already adding your proficiency to these rolls, double it.