Dimensium

"Our world was forever changed when two boundless beings clashed, unleashing a tremendous energy that tore holes through higher dimensions. Unlike the other dimensions, where only parts of the dimensions were ripped, creating holes that eventually repaired themselves, our dimension was directly in front of it, our world was in point-blank range. We believed it would destroy everything, including us. We believed our doom was inevitable, but miraculously, our world absorbed the energy. As a result, the forbidden regions underwent a transformation, with the elements there becoming those that possessed great power.
It was during this transformation that Dimensium was created—a remarkable element that granted us the ability to travel and be reincarnated into higher and lower dimensions. But it doesn't stop there; it allowed us to create empty dimensions with infinite space, with their separate existence of time. However, this was not without consequence the clash between the two great powers. Alongside the creation of Dimensium, due to the energy that tore holes through higher dimensions, creatures from higher dimensions were dropped into our world, causing chaos.
But thats not all an arms race for dimensional superiority ensued among kingdoms, leading to the emergence of a new profession: magic knights. These knights transcended dimensions, becoming higher beings who fought not only against the monsters but also against rogues and other kingdoms," 
- Haruki Chikara
== Summary ==
Dimensium is a special element created during the Blessed age when the 2 boundless being clashed and transformed some area of the Forbidden Region/Dragon Kingdom into it.. When Omni Energy is channelled through it. It allows the user to transcend Dimensions by allowing person to be born as a higher Dimensions being.
The concept behind Dimensium is when character uses Dimensium they are reborn as higher Dimensional being. The user must complete the combat trial otherwise known as the story of the world they are rebirn to return or they will die as the higher dimensional being once completed they return to their home world as a Higher Dimensional Being. Note: Thanks to Omni Energy User is reborn as the main character of the story.
Noboru after liberating the the forbidden Regions a place where inhuman creations like demihumans, elves and more live from the 3 human kingdoms who are the great powers of the world and enslaves inhuman races creating the Dragon Kingdom uses Dimensium which is Vital Respurce to get in Celestial Vanguard Academy and uses it as a bargaining chip.
Dimensium can also be found in the Demon Empire on earth but that place is too dangerous for even the 3 kings to go to.
Dimensium can also create Dimensions unrestrained by laws and concepts like the battlescape
== Properties ==
* Allows one to travel to between dimensions
* Reincarnates user as a higher being
* User is locked once reborn to complete a combat trial
* Create Dimensions to battle in like the battlescape