The hierarchy of planes is classified from low to high as follows: small plane, low plane, middle plane, high plane, top plane.
These planes, varying in levels, together form the Endless Plane, which is the entire universe we currently inhabit.
Small planes usually refer to those that have a plane barrier but lack powerful individuals within the plane.
Generally, the strongest entity a small plane can accommodate is Level 3 Life; any life form exceeding this level cannot enter a small plane, only their projection can.
If a life form exceeding Level 3 forcefully enters, it can easily cause a collapse of the small plane's world rules.
But in reality, life forms beyond Level 3 find it difficult to force themselves in.
Low planes refer to those where life within has developed to a certain scale and possesses considerable strength, including the presence of Level 3 Life individuals.
