Lucky

You have inexplicable luck that seems to kick in at just the right moment. You have a number of Luck Points equal to your proficiency bonus. Whenever you make an attack roll, an ability check, or a saving throw, you can spend one Luck Point to give yourself advantage on that roll, or spend one Luck Point to impose disadvantage on the attack roll of a creature attacking you. You regain your expended Luck Points when you finish a long rest.