"Don't worry. Although you have only a little War Spirit power at present, it'll increase as you use it more frequently," Kyd said reassuringly with a smile. "But that will be time-consuming. I've felt exhausted, just after finishing the first round of shooting!" Carl said discontentedly. It took him a great effort to know how to use the War Spirit power, but its effect was barely satisfactory. "Well, apart from using your War Spirit power more often, there is another method to increase your War Spirit power: increasing your physical strength." "Physical strength? Is there any relation between our physical strength and the War Spirit power?" "Haha, every day without variation, Clark orders all of you to do physical training. Have you ever thought of the reason for him doing this? Your