Combined Training
After all, it would take an extra amount of effort to shield himself from his own environment, which would only make the difficulty of passively constructing these domains that much more difficult. It would have been ideal if his body was highly resistant to these conditions naturally.
Unfortunately, he hadn't engaged in too much body conditioning. After becoming a Squire, the only time he had was when he mastered Adamant Reforging, which was strong but a general boost to his durability and could not handle too much of a particular given environment.
"Do I really have to spend an additional year or two conditioning myself to handle the heat and cold without letting it affect my combat ability?"
Rui found the idea unpleasant.