Over the course of Draco’s research, he came to understand that the mind can sleepwalk and travel between planes of existence, but that it was usually not permanent and uncontrollable. There were ways to curate the experience by meditating and giving the mind a direction, but it was not guaranteed to work, or to have the desired effect. This led Draco in another direction; horizontal time travel. While a time turner was made to travel forward and back in time, it could, in theory, be used to travel sideways through time and thus, into other timelines and universes. 