Chaotic Energy

Introduction
One cultivator to another:

“How do you not even know that? It’s the ‘earth’s energy’, simply put. In even simpler words, it’s the aggregation of all the elemental energies into one. If the energy above the nine heavens is chaotic energy, then the energy beneath the earth is geotic energy. A soul cultivator won’t be able to handle either of the two energies. If they’re too weak, then the energy will invade the body and force them to lose control. If that happens, they’ll explode and die!”

Uses
According to Xiao Feng (Core Stone) the only people able to make use of chaotic energy are Soul Saints, as they require it to cultivate due to natural energies not being enough to cultivate with.