Forostone

A Forostone is the exact core of a Dimension/Alter Reality, holding 30-55% of a dimension's mass.

Foroverse
A Foroverse is a strange universe 3 dimensions lower than the Forostone it is in, and is 0.005% of the diameter of the Forostone. It is the least dense part of the Forostone, It is $$\pi^{10^{6}}$$ times less dense than the space between the Forostone and the Foroverse.