A point

Before teaching his friends how to use the Void, Rain decided to do some tests with Loar and Hardt. He needed their skills to make the others stronger as well, and he was planning to make them reach their abilities to the others, so that was a good chance to hit two birds with one stone. 

They all knew the basics of space magic as well, but they couldn't use it while they were in Rain's pocket dimension because they needed to overpower his spell. Besides, trying that would just make him waste mana.

"Trying to make us your test subjects?" Hardt asked.

"That is right," Rain said. "Now, get a move on."

"I can't even bring myself to be angry when you are this honest…" Hardt furrowed his eyebrows. "Anyway, it might sound convenient to say this, but you might as well let us fight more when we have access to these skills."