The Five Realms

Elemental Forces of Nature are =very= strong on this planet. Mages usually can only specialize in one magical realm. Mages that specialize in more than one realm at a time are quite rare. Void mages are even rarer. Realms that run counter to each other's realms cannot be learned by the same mage. Air Magic can be countered by Earth Magic. Fire Magic can be countered by Water Magic. Earth Magic can be countered by Air Magic. Water Magic can be countered by Fire Magic. Void Magic cannot be countered. Void Magic can counter any other realm of magic – no other realm of magic can counter Void Magic.