Esférsen's God Speed

You use transmutation magic to transform your own body into a bolt of lighting, until the end of your turn your speed is increased by 10 times its normal amount. While the spell is active you can move through creatures, and every time you do so the creature must make a Dexterity saving throw or take 14d8 lightning damage on a failed save, or half as much damage on a successful one as you strike it with a streak of lightning.

At Higher Levels. When you cast this spell using a spell slot of 9th level or higher, the damage increases by 1d8 for each slot level above 8th, And furthermore your speed increases by 100ft for each slot level above 8th.