Chain Of Hell

You lash a chain that bursts into flame with a range of 10 feet long and 5 feet wide. Each creature in the line must make a Constitution saving throw. A creature takes 3d8 fire damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th.