They are beings from higher latitude space. From a human perspective, they are the evil gods of outer space, untouchable, unfathomable, and uncallable.
One day, an old god passed by the outskirts of a huge galaxy cluster called Laniakea. It accidentally discovered the Milky Way Island of the Universe. Then billions of stars were carried by the Hubble stream and moved toward the Milky Way. Unknowing human beings praised it as "the broad white avenue in heaven."
Concept: The instinct of animals is to survive.