Grudge

You have a deep hatred for a particular kind of creature. Choose your foes, a type of creature to bear the burden of your wrath: aberrations, beasts, celestials, constructs, dragons, elementals, fey, fiends, giants, monstrosities, oozes, plants, or undead. Alternatively, you can choose two races of humanoid (such as gnolls and orcs). You gain the following benefits:

• Increase your Strength, Constitution, Intelligence, Wisdom or Charisma score by 1, to a maximum of 20.

• During the first round of any combat against your chosen foes, your attack rolls against any of them have advantage.

• You are always able to make an attack of opportunity against creatures of the chosen type without spending your reaction. 

• Whenever you make an Intelligence (Arcana, History, Nature, or Religion) check to recall information about your chosen foes, you add double your proficiency bonus to the check, even if you’re not normally proficient.