As Fox approached Bertilak, it seemed to be getting hotter and hotter. The sandstorm was still raging around them, though, the sun all but obscured in the sky, so what was causing this heat? It was radiating in waves—from where Bertilak stood. The closer Fox got to him, the hotter it was.

So that’s his Semblance, Fox thought. He thought back to moments when the temperature inside had been more unbearable than outside, and Bertilak had always been close by. Apparently he could turn up the heat, especially when he was angry.

Fox gritted his teeth and pushed onward.

“So I’ll have to beat him quickly,” Fox said. “Before this heat knocks me out.”

“Good luck,” Bertilak said. Fox felt him approaching—as much from the ambient heat shield as from his mental presence and the sand blowing around them.

Fox and Bertilak circled each other. “You’re a disgraceful excuse for a Huntsman,” Fox said.

“It’s easy for you to say, with all those lofty ideas Ozpin and Theodore drilled into your heads. ‘Being a Huntsman is a calling and a privilege, not to be taken lightly.’ ”

Fox had heard his professors at Beacon and Shade give exactly that speech.

Bertilak spat. It was so hot, Fox heard the liquid sizzle and evaporate as it hit the sand.

“They’re just words. You think your headmasters and professors are model Huntsmen? They’re worse than all the rest of us. You want to know why I barely graduated? I was tired of being used as a tool.”

It was so hot, Fox was feeling feverish, weak, muddled. He couldn’t keep this up much longer before succumbing to heatstroke.

“You’re still a tool,” Fox said.

It got even hotter. Oops.

- RWBY: After the Fall, Chapter 13