Withered Will

After drinking this light and dewy potion, you gain the ability to breathe a cloud of withering vapor. For the next minute, you can use a bonus action to exhale a cloud in a 60-foot cone. Each creature in that area must make a DC 17 Constitution saving throw. On a failed save, a creature's speed is halved, it can't take reactions, and it has disadvantage on attack rolls until the start of your next turn. At the start of your next turn, roll a d6. You regain the use of this ability on a roll of 4-6.