Galactic Void

The Galactic Void is an endless space of nothing, but void energy, located between galaxies in the universe. Magicians who are very skilled in performing void magic, are able to open portal rifts through the galactic void to act as effective shortcuts between worlds, but venturing through a portal rift is extremely dangerous, and puts the traveller in risk of being forever captured in the galactic void, thus it's a very rare and unpopular way to travel, that most avoid, despite probably being the fastest way across the universe.