Mana control.

In one of the practice rooms in the Castle, the Fusion magic class was in session.

"Before we move into the topic of the day, I would like to inform you all of some important info." Professor Gibson said. "At the end of next week, you all will be tested based on your level of teamwork."

"That is why within these 2 weeks all your classes will focus more on team effort. So, as to prepare you for both the test and the fast-approaching exercise with your seniors."

"Now for today's lesson. Last week, Blake asked for a demonstration and that I will give." Professor Gibson signaled for the students to step back before activating a containment field protecting the students.

"Double casting is the ability to simultaneously cast different spells as separate entities, while fusion magic is casting spells of different elements as one entity." As Gibson explained, the wind around him began getting chaotic.

"Fusion magic: Typhoon."