The distance between Pangu Continent and outer heavenly realms was extremely far. It was an incredible distance that an ordinary Immortal could not imagine. Apart from a handful of heavenly realms that were blessed to be very close to Pangu Continent, if one wished to travel from some remote heavenly realms, one would have to spend a few years within the alternate dimension before arriving.
With ordinary teleportation formations, it just took seconds to travel between galaxies.
With major teleportation formations, it took merely fifteen minutes to travel between heavenly realms.
