"boom!"
After being flung away, Chen Lei fell to the ground.
However, the light from this cave did not have any killing power. Although Chen Lei was flung away, he was not injured.
Chen Lei stood up from the ground and came to the gate of the cave again.
Chen Lei looked carefully at the gate of the cave and found that there was a layer of white light flowing on the gate, which contained extremely powerful fluctuations of vital energy.
Chen Lei looked at this layer of vital energy fluctuations, and finally determined that only by eliminating this layer of vital energy on the cave door would it be possible to open the door of this cave. Otherwise, there would be no way to open the door of this cave.
Chen Lei swung his fist and punched the vital energy on the gate of the cave, wanting to try and see if he could break the vital energy on the gate of the cave and dissolve it.
However, Chen Lei did not use his full strength, because he did not know what unpredictable changes might occur if he used all his strength to bombard the cave gate with energy, so he reserved some strength to deal with it.
"Boom!"
Chen Lei punched the cave door. The vital energy light on the cave door suddenly emitted a powerful wave again. A huge force bounced back directly and hit Chen Lei.
Chen Lei was prepared this time and was not blown away. However, the powerful force made Chen Lei retreat more than ten steps.
Chen Lei could feel that the rebound force coming from the cave door was twice as strong as the force he had blasted out.
But when he looked at the layer of white vital energy on the cave door again, he found that the white vital energy had not decreased at all.
Chen Lei punched out again, increasing his strength.
This time, the result was the same. Chen Lei was repelled by the power contained in the cave door, but the power in the cave door did not decrease at all.
Chen Lei felt that the vital energy contained in the door of this cave was incredibly deep. Even if he used all his strength, or even the critical rune secret technique, the power he exerted could not break the defense formed by the vital energy in the cave.
However, after several attempts, Chen Lei had a slight understanding of the vital energy in this cave.
"These vital energies are exactly the same as Jiang Yi's Ten Thousand Daos Supreme Power."
Chen Lei looked at the layer of vital energy outside the cave and confirmed one thing.
Chen Lei once fought a great battle with Jiang Yi, and he had a very deep impression of the vital energy formed by the Wandao Duzun Gong.
Chen Lei was certain that the layer of energy attached to the cave door was the energy formed by practicing the Wandao Duzun Gong.
However, Chen Lei believed that even if Jiang Yi came, he would be helpless in the face of the vital energy attached to this cave and would definitely not be able to break it.
"No, since it can't be broken, then can it be absorbed?"
Suddenly, Chen Lei had a flash of inspiration in his mind, as if he had grasped something, and he became excited.
"Yes, that should be the case. This energy of Yuan Qi cannot be broken by Jiang Yi and I. Even if a master at the peak of the ninth level of Yuan Shen Realm came, he would be absolutely helpless. However, it is obvious that this is an opportunity left by Emperor Jiang Xiong for future generations. It cannot be unsolvable. The energy on these cave doors is left for future generations to absorb and refine."