「萬界之癌」在諸界蔓延之時，名為「裂界」的侵蝕現象也在悄然滋生。博識學會認為兩者之間存在因果關係，即「裂界」由「星核」催生，將接觸到的事物與空間轉變為特殊的裂界造物。造物普遍以侵蝕的形式存在，它似乎保有原型的記憶與習慣，但外在表現上則大相逕庭，往往表達出強烈的排他性。研究裂界的學者警告稱：被裂界侵蝕的物件與其原型應當視為毫無關聯的兩種存在，對其抱有的一切幻想皆會引致嚴重的後果。
除侵蝕以外，「裂界」還會記錄被裂界接觸事物的以太信息，與裂界本身保存的數據混合，產出一種經過嫁接的裂界造物。在每個被萬界之癌侵蝕的世界裏，無數遺器、裂界怪物、甚至被神秘分隔的異空間誕生在各個角落，人們仍在研究這一舉動背後的目的。
Fragmentum (Phenomenon)
As the Cancer of All Worlds spreads along the worlds, the corrosive phenomenon of Fragmentum is also quietly expanding. The Intelligentsia Guild believes there is a direct, causative relationship between the two phenomena. They believe that the Fragmentum is caused by the Stellaron, and converts the entities and spaces it touches into special Fragmentum creations. These creations usually exist as a type of spatial corrosion. They seem to preserve the memories and habits of the original physical entity, but manifest significantly different outward behaviors and are often very hostile towards other beings. The scholars researching Fragmentum warn that we should consider any being corroded by Fragmentum to be a completely unrelated existence to its original form. Harboring any kind of delusions towards it could cause grave consequences.
Apart from corrosion, the Fragmentum also records the Aether information of the entities and spaces touched by the Fragmentum. Such data is combined with the information inherent in the Fragmentum and develop into a type of hybrid Fragmentum creation. Countless Relics, Fragmentum monsters, and even mysteriously isolated paranormal spaces would spring up in every corner of the worlds corroded by the Cancer of All Worlds. We are still investigating the intent behind such activities.
