Crystal Barrage

You fire a barrage of glintstone crystal shards from your arcane focus in a line 60 feet long and 5 feet wide. Each creature that starts its turn in the line takes 6d4 force damage.
On subsequent turns until the spell ends, you can use your action to continue firing. When you continue firing, you can choose to change the direction of the line. If you move or take another action, the spell ends.
At Higher Levels.
When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d4 for each slot level above 3rd.