Why Are My Heroic Spirits All Conceptual Gods?

In the age of fighting spirits, as long as people are in harmony with the heroic spirit, they can contract the heroic spirit to fight for them. Jiang An traveled through time, and the first heroic spirit he contracted with turned out to be the lowest-level river god among the mythical heroic spirits. When his future was bleak, he awakened the [Conceptual God Development System]. Etc! Concept God?