Mundi
What we call Earth, or the Universe, is only one of several worlds or realms that exist parallel to each other. In the same place, but unseen, they are separated from our world by a barrier called the "veil", (or "srud" in Tunge). Some of these worlds are physical in nature, like ours, others are comprised of pure magic energy.
The "energy worlds" are home to entities of pure magic energy. Such an entity is often referred to as "Ʒaast", which simply means "ghost" or "spirit".
When entering such an "energy world", a human will still perceive it as physical, just heavily themed. The reason is simply that humans can't perceive it in any other way.
Such a world is referred to as "Anþerwelt" or "Mundus".
Energy Worlds
Energy worlds, as the name implies are Mundi comprised of pure magic energy. These worlds are home to Ʒaasts, or elementals (a more modern term) which were summoned in ancient magic.
It is possible for physical beings to enter energy worlds. If they do so, they will experience the world as basically a heavily themed physical world, simply because the mind of a physical being is hardwired to interpret whatever the being perceives as such.
The rules of such a world may, however, be very different from our world.
Transferring objects from an energy world into a physical world is difficult as the object will usually manifest as energy, which will dissipate quickly. Beings from an energy world can also only remain in a physical world for a limited amount of time, as they have no actual physical form.
World of Crystals
The World of Crystals is a world of light and sound which manifests into a world covered in complex crystal structures, some as large as mountains, others incredibly small. It is a world of glittering light and harmonious tones.
World of Dreams
The World of Dreams, sometimes referred to the World of the Mind or World of the Spirit, is often considered the most dangerous world to venture into. This world's environment, physics and rules are in a constant flux as it is shaped by the dreams and nightmares of humans.
When venturing into the World of Dreams, one can never know what to expect it is easy to lose one's life, and even easier to loose one's way and get lost in this world forever. As such, it is generally forbidden to enter this world.
Interacting with the World of Dreams can lead to strange and unpredicatable phenomena manifesting into reality. Locations like the Crooked Forest of Krzywy Las in Poland are believed to be the result of such manifestations. Although the Crooked Forest is, at best, a minor event.
World of Elements
In the World of Elements, everything that exists is made from the four basic elements - fire, water, wind and earth, and it is home to Ʒaasts of these elements.
The environment of this world is extremely volatile with frequent storms, floods, volcanic erruptions and earthquakes. Any spells that manipulate the elements, or the fundamental forces of nature, draw from this world.
World of Light and Shadows
The World of Light and Shadows, sometimes referred to as just the World of Shadows, manifests as a place where everything seems to consist of the play of light and shadows. It is a strange place that is difficult to navigate for humans due to its alien and confusing apperance.
The World of Light and Shadows is home to the Umbralis.
The Illustro and Infusco spells are the most common spell that draws from this world.
Physical Worlds
City of Glass
The City of Glass, or World of Glass, also known as Illyria, is a barren world covered entirely in structures made from stained glass. Some of these structures can reach the height of skyscrapers, making them look like a city from the distance, hence the name. Some people like to harvest the glass to use it in talismans and other magical constructions, believing it to possess special powers. However, when examined, it seems to be perfectly normal stained glass.