Magical Duelist (Wisdom)

You have developed a set of skills to allow you to better combat hostile magic from enemies, as shown by the following:

• Increase your Wisdom, Charisma or Intelligence score by 1, to a maximum of 20.
• You learn one cantrip that requires an attack roll. Your spellcasting ability for this cantrip is the one increased by this feat.
• If you were to be a target of a spell from a creature that you can see, you can use your reaction to impose disadvantage on that creatures attack roll, alternatively you can give yourself advantage if you would make a saving throw. You can use this reaction a number of times equal to your proficiency bonus before needing a Long Rest.