The fifth-level wood-element crystal is called Xuan Wood, and generally only Emperor-level wood-element soul pets have this fifth-level wood-element crystal. The Demon Tree Warrior had comprehended this fifth-level wood-element crystal at the Peak Monarch level, which made Chu Mu's smile grow even wider.
Controlling the wood-element crystal ahead of time does not mean that the Demon Tree Warrior has reached the Emperor level strength. However, at least this allows the Demon Tree Warrior to be much stronger in the Peak Monarch realm than those soul pets who only control the fourth-level wood-element crystal.
