This was possibly the most power Lin Mu had ever used at once. It had reached a level he had never even expected. It was the full power of his Five Treasures realm cultivation base combined with his Spirit Qi cultivation base.
It was the combination of those two that would allow him to do something like this and it was beyond the realm of 'normal'.
In fact, Lin Mu discovered a new thing when he did this. His Gold body, which had been mostly impenetrable, was actually being strained!
And it wasn't something external that was making it like that, but his own strength. Lin Mu reckoned that if he didn't have the gold body of the True Gold body forging arts, he might have never been able to do this.
His body might have destroyed itself by doing something like this.