Currently, Sam was facing a big sand golem. Using his energy mode, he was trying to cut down that sand golem, but the defense of that golem was very high and because of this, he was unable to reach the crystal of that golem. The golem quickly recovers and once again attacks Sam. Sam quickly jumps from that place. Fortunately, right now, he was facing only one golem. Right now, he wasn't using a huge amount of spiritual energy because he wasn't sure when more monsters would attack him, and because of this; he did not want to risk that. Also, because he already uses the concealment technique, you can say at least 9 hours right now, he wasn't using that technique. Even though that technique did not pressure him, there was still a limit for his body to use that technique.