Aura and Vise

Aura is a physical manifestation of one's self. Everyone living thing has Aura, but few know how to properly use it. It can act as a shield, a weapon, or a sixth sense. Aura is invisible to everyone unless you've been trained to sense it. This is only half of the process when performing magic. The other half is Vise. Vise is an invisible energy that exists everywhere. If someone is properly trained, not only would they be able to see vise, but also be able to use their aura to manipulate the vise around them. This is what you would call the expression of one's magic ability.
For the abilities, that all depends on that person. An example is someone is born with fire-based abilities, while someone else has water-based abilities. Not to say everyone is stuck at with one ability, but everyone has their starting point. Meaning with much practice, anyone can become skilled in the ways of magic.

Manifestation

Aura can come in any color. It depends on the person's personality. Vise, on the other hand, is invisible. In high concentrations, it's like a white fog. Although if you've been trained to see vise, it will look like regular fog.

Localization

Everyone has an Aura on both worlds and vise is everywhere on both worlds. But with Earth, there's barely any vise.

Type

Metaphysical, Arcane