The vial contains several small green thorny bits within.  When throwing this potion, make a ranged weapon attack.  When a target is hit, this potion explodes, sending out tiny razor sharp thorns in a circular pattern up to a 10 foot radius.  Any creature caught within the blast zone takes 2d6 piercing damage.  A Dexterity saving throw of DC 14 may be made, and if successful, the damage is halved rounded down.