The Heaven Symbol Spirit Tree was a type of unique spiritual being. For Symbol Masters that cultivated Mental Energy, it was undoubtedly a god-like existence. It was said that if a high rank Soul Symbol Master was able to refine it, he would very likely be able to cross that crucial step and reach the realm of the Heaven Symbol Master.
A Heaven Symbol Master was equivalent to a Nirvana stage practitioner!
Moreover, the Heaven Symbol Master and Soul Symbol Master were two entirely different levels. If one would say that a Soul Symbol Master was stuck at the superficial usage of Mental Energy, a Heaven Symbol Master would be known as one that had truly reached the next level.
It was said that some powerful Heaven Symbol Masters were able to condense Mental Energy into miraculous Symbols, and move the power of the land with a single gesture. They possessed great power and even a Nirvana stage practitioner would find a Heaven Symbol Master a rather troublesome opponent.