Evaporate

One target creature that you touch as part of casting this spell makes a Dexterity saving throw against your spell save DC, dealing 8d8 necrotic damage on a failed save as the targets flesh begins to evaporate. If this damage would bring the target to 0 hit points, the target instantly dies as it vaporizes and becomes a crimson cloud that partially obscures vision in the space it occupied for 1 round. A target that passes the save receives half damage, and no other effect. 

You may also touch any body of liquid and change it to a mist that also partially obscures vision in those spaces. You can effect 8 5-by-5 foot square cubes in this way. 

At Higher Levels. If you use a spell slot of 5th level or higher, the damage increases by 1d8 for each spell slot above 4th level.