You dash with impossible speed in a direction you choose, striking with the weapon used in the casting in a line up to 30 feet long and 5 feet wide. Each creature in the line must make a Dexterity saving throw. A creature takes 2d10 damage on a failed save, or half as much damage on a successful one. The damage type is the same as that of weapon used in the casting.
You then appear in the nearest unoccupied space at the end of the line. If you end this movement in the air, you fall.
At Higher Levels.
When you cast this spell using a spell slot of 3rd level or higher, the length of the line increases by 30 feet and the damage increases by 1d10 for each slot level above 2nd