Vok Nebula

Vok Nebula is the homeland of Vok and the source of sparks within Protoform Transformers. It is a spiritual dimension in the Galaxy. When a Protoform Transformers dies, his spark will travel back and rejoin Vok Nebula.

Matrix Dimension
The Matrix Dimension is analogous to Heaven in both Maximal and Predacon belief systems. The Matrix Dimension myth is probably based on the Creation Matrix. In their religious belief, the Maxtrix Dimension is a place where a spark born and a destination in afterlife. The reality of Maxtrix Dimension is infact Vok Nebula.

Trivia
According to Larry Ditillio, the story editor of Beast Wars, the concept of Vok Nebula was originally intend to be used in the series. However, the concept was later replaced with Allspark in Beast Machines.