Earthside is a mostly ordinary realm similar to our own. Magic still exists, but is more spread out throughout the galaxy rather than mostly centralized within one planet.
In ancient times, humans had discovered how to utilize magic in their own ways, but as time passed and technology progressed, planet Earth had forgotten about magic, thus weakening it overtime. In the modern day, magic is treated simply as myth and legend. Despite this, beings born with a specific element will still have their passive abilities.