The mirror may only function as a portal when two of the same objects from each side, such as Zak Saturday and Zak Monday, are present near to the mirror. The anti-matter universe on the other side of the mirror is dark and dystopian where the Mondays are loathed as criminals. Everything functions as its parallel opposite: Zak Monday is cruel and psychotic, and boastful with it, Doc Monday is a brutish fool, Komodo Monday is an evil genius who can talk, and the Airship is powered by darkness, rather than sunlight.