Vial of Lightning

A creature may use an action to remove the stopper, causing lightning to streak from the vial in the direction it is pointed to a target up to 120 feet away. The target must make a DC 16 Dexterity saving throw, taking 8d6 lightning damage on a failed save, or half as much damage on a successful one. The lightning then explodes out from the target striking the 3 closest creatures within 30 feet of the target, these creatures must also make a DC 16 Dexterity saving throw, taking 4d6 lightning damage on a failed save, or half as much damage on a successful one.