Thunder Bolt

A flash of lightning streaks toward a creature of your choice within range. Make a ranged spell attack against the target. On a hit, the target takes 4d6 lightning damage, if the target is wearing or holding metal your attack roll is made at advantage, thanks to it conductivity.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.