Void Slip

You twist the fabric of space around you, disappearing and reappearing in an unoccupied space you can see within 60 feet of you. Immediately after you disappear into the void each creature within 10 feet of the space you left must make a Dexterity saving throw, taking 4d6 cold 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 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.