Just as Rex said, the Sky Arena was indeed a great place for Fang Zheng to hone his skills. According to Rex, the entire Sky Arena was divided into three areas: primary, intermediate, and advanced. The primary area had ten subsections, the intermediate had five, and the advanced had only one. In Fang Zheng's view, this was very similar to the servers in online games.
Now, Fang Zheng was in the last "newbie server" of the primary area, where most were Mage Apprentices who had just entered the White Tower not long before. The intermediate level was for regular Mages who had left their apprenticeship behind, while the advanced was reserved for powerful Mages.
Although Fang Zheng often heard the saying "There is no such thing as a useless spell, only useless Mages," the reality was not so. Some spells, only when utilized in actual combat, revealed their strengths and weaknesses, and thus could be chosen or discarded to complement one's own combat style.