Most of the worlds were too far apart and required a long travel through the starry skies. Therefore, there were very few teleportation formations that could teleport into a place directly.
Furthermore, it was also a potential risk of living beings of other races could teleport into a world at will.
Long-distance teleportation in the endless starry skies was not easy.
Even Immortal King experts who had the ability to tear through the void did not dare to travel through the spatial tunnels casually.
That was because there were many unknown danger zones hidden in the endless starry skies, such as forbidden grounds or black holes. If one was careless and was swept into them, even Immortal King experts would die easily.
Su Zimo and the others used the teleportation formation of the Sword World to leave. Lu Yun and the other three Immortal Kings controlled an immortal boat spirit treasure and shuttled through a spatial tunnel.