The Ehrivevnv, of The Methamondst Conclave, is a dimensional puzzle. The puzzle presents itself as the simplest primitive allowed by the current navigationable dimension.
The prism mesh is porous in that it allows to be looked into. The inside of the puzzle displays a universe, where at its center, lies another Ehrivevnv, which in turn, seemingly holds a universe. With each universe that any one puzzle contains, the laws of nature grow increasingly more complex and diverse.
Some, believe that superior intelligences reside deep into the puzzle, others believe it to be a trap.