Thexis' Shattering Arrow

The next time you hit a creature with a ranged weapon attack before the spell ends, this spell creates a crackling arrow that surges with thunderous energy from your ranged weapon or ammunition. In addition to the normal effect of the attack, the target of the attack and each creature within 5 feet of it must make a Dexterity saving throw. A creature takes 1d10 Thunder damage on a failed save, or half as much damage on a successful one.