Shadow Dimensions

The Mirror Dimensions
From what can be told, shadow dimensions are formed when magic enters probability space.

Rather then forming around realistic probabilities, instead dimensions form around concepts. Conceptaul reflections of how our world would look under different worldviews, rather then actual renditions of how things would be different. The Shadow Dimensions.

While there a believed to be 100 shadow dimensions, only a handful have been encountered and explored. It is entierly possible the true number is much higher or lower

Each shadow dimension is the earth under a certain different situation- if everyone was evil, if everyone was magical, if everyone was perfect, etc. This is different to an actual alternate timeline in a number of important ways.

Unreality
Shadow dimensions are not real, in the technical sense. They're real in the conventional sense- a person from a shadow dimension is flesh and blood like anyone else- but they don't have autonomy. Their history and world are linked to ours, and reflect ours. The inhabitants don't have free will, whatever that concept means. They reflect the original. History doesn't follow reason- it twists and bends to stay on "theme", however little it makes sense that a world of apes would stay similar to our own. Probability and action works to ensure the world stays a reflection of ours

Psychics and mystics have confirmed the inhabitants of shadow worlds have minds and souls- they're not philosophical zombies or marionettes. They're thinking, feeling people. They're just people who exist to reflect us. It seems most shadowversers see this as a purely philosophical issue, not one of practical concern. But then, how could they choose not to?

Explored shadow worlds
The Mirror Verse- the shadow world with the most contact with earth prime, this world inverts the morality of ours

Animal world- everyone is an anthropomorphic talking animal, and the world is a cartoon. Either whimsical or awful, depending on who you ask

Magical world- everyone knows magic. All superhumans have magical origins. There are similar worlds for other superpower sources.

Ruin world- everything that can go wrong, does go wrong. A world of misery and suffering. An opposing utopian world is likely, but has not yet been found.

Mundane world- our world but without superpowers. No mutants, no magic, no psychics. Classified as Earth Parallel 368 under obsolete multiverse theories.