Lightning Bolt

A stroke of lightning forming a line 100 ft long
and 5 feet wide blasts out from you in a direction
you choose. Each creature in the line makes a
Dex save. A creature takes 8d6 lightning damage
on a failure, or half as much on a success. The
lightning ignites flammable objects.
At Higher Levels. When you cast this spell using
a spell slot of 4th level or higher, the damage
increases by 1d6 for each slot level above 3rd.