As an action, you can throw a vial up to 15 feet that shatters in a 10-foot radius, releasing a cloud of smoke and toxins. Each creature in the area must succeed on a Constitution saving throw (DC = 8 + your proficiency bonus + your Intelligence modifier) or become blinded and poisoned for 1 minute. Affected creatures can repeat the saving throw at the start of each turn to end the effect.
You can use this bonus action a number of times equal to your Dexterity modifier (minimum of once), and you regain all expended uses when you finish a long rest.
You can use this bonus action a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a short or long rest.