After an Apprentice became a Wizard, they must do one thing: The Wizard's future training resources.
During the Apprentice period, training resources were scarce, so they could be easily done by completing the missions given by some organizations. However, at the Wizard level, it was far from enough.
In the past, a bottle of Meditation Water could allow him to train for a month. Now, a bottle of Meditation Water was not enough for the consumption of a single meditation. In addition, Wizards had to find an elemental spring to build a tower, burn resources to stack the tower's elemental concentration, and so on.
In short, after reaching the rank of a Wizard, the demand for training resources would increase exponentially. At this time, relying on missions to earn training resources was really...
Even if one died of old age, they would not be able to save up enough to complete a closed-door training...
Then what should they do at this time?