The structure of the world's planar cosmology has been a subject of hot debate within arcane circles for some time. Multiple theories have been proposed, with some of the most prominent being the World Tree and Planar Pancake theories. Despite the differences between these, it is agreed that the various planes of the universe exist in a stack of sorts, with some “above” and some “below” others. This arrangement may or may not be physical - flying high enough up in the Jaernian sky won't take you to the Dreaming, for example, but the bottom-most layer of the Beneath does flow directly into the Void.

These two enigmatic worlds were first proposed to exist by the ancient Torandor scholar Jican Trion. They have recently been proved to exist by the Centralia Mages' Guild, though travel to them is thought to be impossible. They are thought to lie “perpendicular” to the other planes, suffusing them with magic.

Jicania is the plane of wild magic from which all magic, of any form, comes from. How it is generated on this plane is not known, but Jicania is completely composed of raw magical energy. Hypothetically, travel to this plane would result in all magical power for any spellcaster being replenished in an instant, followed by the immediate destruction of an individual's body, mind, and soul by the uncontrolled magical energy there. Jicania is thought to be inhabited by “aether elementals”; beings of pure magic which subsist on it. Aether elementals, if they exist, may be the only life in Jicania. It is a subject of hot debate as to whether Jicania contains infinite magical energy, or if its stores are finite and will be depleted in, perhaps, millions or even billions of years.

Trion'kar is the opposite of Jicania, a plane that grounds and sucks down magical energy. The material of terisium is a direct connection to Trion'kar, making it effective in anti-magic applications. Travel to Trion'kar would mean almost instant death, as every part of an individual would be “imploded” after having every bit of magical potential drained away. It is not known if any form of life exists in Trion'kar. A fringe belief in academia is the “exchange theory”, suggesting that Jicania and Trion'kar are not simply source and sink, and that different types of spellcasting transfer energy from one to the other in an exchange, and this constant loop ensures that neither plane will ever be depleted of energy. However, this theory is mostly discounted by mainline arcane scholarship.

The Elemental Planes: Where the sources of elemental magic flow and ebb from, various types of magical flux pass through the Planar Sea and collide into the planes of Jaern and Cahyali. In some places, these planes may overlap with ours and create natural portals, allowing elemental beings to enter Jaern/Cahyali.

The Dreaming: The Dreaming has existed since the dawn of time, when the first dreams were created. The land of the dreaming is the culmination of the dreams, fears, aspirations, hopes, and nightmares of every living thing that dreams.

Jaern: The planar home of Adventurers (also identified as Portal I from the Alpha Site)

Cahyali: A smaller world where adventurers also hail from, which features much larger landmasses than Jearn.

Infero: The land of the dead, the fallen, once-beautiful plane of Cielo. It is the passing place that souls go to before reaching their afterlife.

Kurago: A plane of existence attached to most other planes.

Alpha Site: The Centralia Guild of Wizzards extra dimensional portal farm.

The Beneath: Little is known about this place, as adventurers have only very recently learned of its existence. It seems to be the home plane of demons that exist on Jaern…

The Planar Sea: The extradimensional space that planes of existence, well, exist in. Theoretically inhabitable to life (that we know of), and there is no current way to travel directly to the Planar Sea.