After reaching Four-Crown, the biggest advantage is that one's thoughts are no longer limited to merging with one's own magical power. At the Four-Crown Realm, the increase is not only in magic power, but also in refinement. The body and magic power combine further. Meanwhile, spiritual power also makes significant progress. In addition to controlling one's own magic power, there is enough external mental power to control the elemental forces from the outside world, in conjunction with one's own magic power. This undoubtedly represents a qualitative leap in power for the magician.