Izroth knew that the reason for this sudden change of atmosphere when he crossed over into Proximus was the difference in both mana quality and quantity within the kingdom itself. Proximus was well known for being at the forefront when it came to magic and all things related to it.
In fact, one who had not visited the magic capital city of Proximus could not be considered a true student of magic. Their library contained a vast amount of magic knowledge and theories from all over the world and would make the Amaharpe library look like a joke in comparison. However, just as with the palace library, one needed the proper qualifications or credentials for entry.
One of the biggest reasons that magic casters traveled from all over the world to train and study in Proximus was due to the naturally dense mana in the atmosphere. This made the third kingdom an ideal location to develop one's magic abilities.