The magic system is divided into 3 classes and 3 divisions of magic.
You have the Druid magic class, the Knight magic class, and the Mage magic class.
The magic itself is divided into 3 categories: Basic, secondary, and high.
The basics are your four elemental magics. Secondary is the combination of those, respectively: lightning, Lava, Nature, and Ice. The high magic has only two types: light and void.
Hope that helps.