Potion of Luck

Potion, rare

When you drink the potion, you become blessed with extraordinary luck. Whenever you make an attack roll, an ability check, or a saving throw, or when an attack roll is made against you, you can choose to roll an additional d20. You can choose to do so after you roll the die, but before the outcome is determined. You choose which of the d20s is used for the attack roll, ability check, or saving throw. This effect lasts for 1 hour or until you have used your luck three times.