Evaporating (profainly called misting off) is when a wizard turns into a invisible, gaseous form of themselves that can fly quickly across large distances. Whenever a person evaporates there's always loud quacking sound for no apparent reason. A downside to evaporating is that you can easily get sucked into a nearby dehumidifier and die. Evaporating also leaves your clothes smelling musty and requires a license.
Evaporation appears multible times throughout the series and is used by various characters.