The black wing King had originally thought that Tang Zhen's endurance had already reached its limit.
With just a light attack, the defense would be broken, and then he would be at his mercy.
The black wing King had a clear understanding of his own strength. Ordinary fiendish demons were no match for him.
He could easily kill an ordinary Demon King with a raise of his hand.
The stronger demon kings might be harder to kill, but they still couldn't escape the same fate.
The mutated tree in front of him was indeed stronger than the other demons, and it was enough for the black wing King to spend more effort on it.
However, that was all there was to it. In the black wing King's heart, he still looked down on the mutated tree.
However, the black wing King had indeed used his full strength in this wave of attack, but it was only to protect his own face.