Arc Gauntlets

Exposed magnetic coils and loose wires protrude from these haphazardly assembled gauntlets. These gauntlets have 7 charges, regaining 1d4+1 charges after each long rest. As an action, you can spend 1 charge to launch a blast of energy in a 5-foot wide, 15-foot long line in front of you. All creatures in this area must make a Dexterity saving throw (DC 15). On a failure a creature takes 3d10 lightning damage.  

Notes: Damage: Lightning, Damage, Handwear