Unlikely Circumstance

You've learned how to make even the most unlikely of occurrences into an advantage. Once per day, when you fail an attack roll, ability check, or saving throw, you may describe some incredibly unlikely circumstance that occurs at that exact moment, allowing you to reroll the attack roll, ability check, or saving throw with advantage. 

It should be noted that the prerequisite states that you cannot have lucky to take this feat, but having this feat does not prevent you from taking lucky afterwards.