Blitz Shift

You briefly take the form of living lightning and can make three dashes, one after the other. Each dash allows you to move 15 feet in a straight line and you can pass through creatures, but not solid objects such as walls, doors, or windows. For the duration of the spell you ignore difficult terrain and cannot be grappled or restrained.

Each creature you pass through must make a constitution saving throw. The creature takes 1d12 lightning damage on a failed save, or half as much on a successful one. Creatures wearing or carrying metal objects have disadvantage on this save.

Until the start of your next turn, you gain resistance to non-magical bludgeoning, piercing, and slashing damage and immunity to lightning damage. 

At Higher Levels: When you cast this spell using a slot of 4th level or higher, you can take an additional dash for each slot level above 3rd.