Thunder Bolt

You hurl a bolt of lightning at a creature or object within range. If the creature is wearing or holding metal, or the object's construction is fully or partly metal, then roll at advantage.

Make a ranged spell attack against the target and on a hit the target takes 1d8 lightning damage.

Whether the target is hit or not it must make a Constitution saving throw. On a failed save, the target takes 1d4 thunder damage. On a successful save, the target takes zero thunder damage.

The lighting damage increases by 1d8 and the thunder damage by 1d4 when you reach 5th level (2d8 and 2d4), 11th level (3d8 and 3d4), and 17th level (4d8 and 4d4).