Every cultivator begins their journey at the Spirit Realm. It is the first realm they must pass through and is succeeded by the Origin Realm.
The 1st level of the Spirit realm. The main point of it was to train the physical body with special methods, and to increase strength.
But after reaching the 2nd level of the Spirit realm, one must use ways to condense spiritual energy. Only people who successfully condensed their spiritual energy in their dantian could truly start their path in martial cultivation.
A person that entered the 6th level of the Spirit realm at the age of 15 would already be considered to be a genius.
