Bullets are always most threatening when not fired.
The same is true for spells.
The spells recorded in the Law Book, in their ready but unreleased state, best help both conflicting parties maintain a certain level of calm and restraint. Zheng Qing needed the two Black Wizards opposite him to stay a bit calm, and he also needed to control his own impulsive heat.
Because he wasn't alone.
Beside him was a Little White Cat that had lost its Mana and hardly had any self-protection abilities. He had to find a way to safely lead the Little White Cat away—charging at two unknown Black Wizards was not within the consideration of the young cost student.
For one, nearly half a year of school life had gradually taught him the wizards' cautious way of handling things, never to take risks without full preparation; secondly, right now, he did not have too many methods to deal with the two Black Wizards.