Substances were divided into three levels: Low Level, Middle Level, and High Level.
Individuals between Level 11 and Level 100—those ranging from Warrior Rank to Legend Rank could only use Low Level substances, as their source cores were incapable of handling Middle or High Level ones.
Once a person reached Level 101 and became a Planetary Being, their source core goes though a big transformation and gain access to Middle Level substances, which not only increased the strength of their powers by four to six times but also came with various additional effects.
To use a High Level substance, however, one needed to reach Level 501 and step into the realm of a Cosmic King Level being.
Substances also came in many different varieties. For example, there were wind substances that could only be used by individuals with wind powers, and water substances that could only be used by those who wielded the power of water.
