You weave together threads of energy to sheath a blade with lighting. This magic lasts until the spell ends. Attacks with this weapon deal and extra 2d6 lightning damage on a hit. In addition, the blade enchanted with this spell sheds bright light in a 20 foot radius, and dim light for an additional 20 feet.

At Higher Levels. When you cast this spell using a 3rd- or 4th-level spell slot, the damage increases to 3d6. When you cast it using a 5th- or 6th-level spell slot, the damage increases to 4d6. When you cast it using a spell slot of 7th level or higher, the damage increases to 5d6.