Spiritual Energy!
Of course, it might also be evil energy or demonic Qi!
As for why it surged into Feng Qiwu's body, it might be because he has a natural constitution that can spontaneously absorb spiritual energy or demonic Qi.
However, Bai Susu is more inclined to believe that the energy surging into Feng Qiwu's body is demonic Qi.
If it were spiritual energy, it should be beneficial to him and shouldn't cause such a tragic outcome as body explosion and death.
Moreover, Feng Qiwu himself just said that the force would destroy his body.
So, the question now is, where did the demonic Qi come from?
Whether it's spiritual energy or demonic Qi, it should just be a force in the world. Even if Feng Qiwu's constitution is special and can spontaneously absorb this force, shouldn't others be able to feel it?
