Decob

A decob looks like a big ten, because it is. It is made out of very small particles called Omega Particles. They are white because they have a strange property of any matter touching will become white and go about the speed of light.

The center of the 0 in the "big ten" contains 11 Unidecobs / Superplurobs, which shrink the Decob by attempting to expanding it in. However, the Omega Particles are intelligent, so they have developed stronger and stronger defense over time to prevent the shrinking of Decobs.

Darker matter
Much like The Inside, it can contain Darker matter.