Voltedge

Weapon - rare - requires attunement

This split metal sword arcs with electricity between its two halves. When you hit with an attack using this magic sword, the target takes an extra 1d6 lightning damage. While holding this sword, you can use an action to unleash a concentrated beam of lightning from the blade in a line that is 60 feet long and 5 feet wide. Each creature within that line must make a DC 15 Dexterity saving throw. A creature takes 4d6 lightning damage on a failed save, or half as much damage on a success. Once this property of the sword has been used, it can’t be used again until the next dawn.

The sparking flashes of light. The hum of building energy. The snap of discharging electricity. The cry of smoldering monstrosities.