Some Fragmented Realms could be identified from the outside. If Consciousness Life had seen one before and made it out alive, they would mark it and assess its danger. Information on these Fragmented Realms was kept in the Realm of Intentions, collected in a book called Forbidden.
The book had just one word for a title: Forbidden. It was known as the Book of Forbidden, and contained records of dangerous Fragmented Realms confirmed by Consciousness Life over countless years. There were well over a hundred. Most of them couldn't be classified by danger level, because no Consciousness Universe was willing to test them. Many had been recorded only because they pursued Spiritualized Universe cultivators, whose encounters were then used as a reference to assess the danger.
Moreover, Fragmented Realms could drift away and were difficult to find, but some had still been clearly observed.
The Fragmented Realm Butterfly Dance Horizon spoke of was one such realm. A creature inside it wielded a bamboo knife and had the strength to threaten the Thirteen Celestial Phenomena. It was one of the most dangerous Fragmented Realms, known as the Bamboo Knife Fragmented Realm. In Wu Wei's memory, the Book of Forbidden listed at least five realms on a par with it. Some were even more dangerous, but aside from the Thirteen Celestial Phenomena, no creature dared test them, so no one knew just how dangerous they were.
Butterfly Dance Horizon was lucky to have escaped the Bamboo Knife Fragmented Realm.
The creature wielding the bamboo knife had been enough to make Wu Wei wary—though that was the Wu Wei of long ago. Back then, he had only just become one of the Thirteen Celestial Phenomena. He wasn't as powerful as he was now, and hadn't yet learned the Sword of the Heavens. Even