Coin-flipped Luck

Your luck tend to flip on its head, hard:

• You start with 5 charges of Coin-flipped Luck. Before you roll any non-damage roll, you can choose to expend a charge to give yourself advantage or disadvantage on it, however after that roll, you have the opposite effect on the next non-damage roll (if you take advantage, the next roll will be at disadvantage and vice-versa).
• After using this feat, you can not use it on the next turn.
• You recharge all charges on a long rest.