Thunderbolt

You brandish the weapon used in the spell’s casting  causing it to glow with radiant energy, and make a thrown weapon attack against a creature within 25 feet of you. On a hit, the target suffers the weapon attack’s normal effects and takes an additional 1d6 lightning damage.

This spell’s damage increases when you reach certain levels. At 5th level, the additional lightning bonus becomes 2d6. The damage increases again at 11th level 3d6 and again at 17th level 4d6.