Identified as a single type of creature or "species" so to say, the immaterial infestation is a sort of collective entity made from pure psychic energy and recycled matter. This eldritch being is fairly specific and predictable, for which it differentiates from others of its kind breaching into our reality after a psychic meltdown. Immaterial infestations are able to consume, process and repurpose most forms of worldly matter, but differentiate between inanimate and living mass in the following way;
- Inanimate matter becomes part of an infestation superstructure, which contains the original transdimensional conduit and, theoretically, the overseeing intelligence behind every infestation. These hive superstructures can be as small as a family car, or as large as a castle. Because the destruction of a conduit will tear the entire infestation apart, superstructures tend to be hastily armoured using debris, buildings and objects, while their interiors are commonly non-Euclidean, and far larger than they appear on the inside.
- Living matter is assimilated as infestation drones, autonomous beings which may be either of their original shape or amalgamates of numerous creatures, all now controlled and empowered by crystalised psychic energy. While physically anchored to our reality, the empyrean energies which have infested their vessels grants them eldritch powers beyond human comprehension. Each individual drone is extremely dangerous in combat, but is largely limited by the local laws of physics.