Locking The Heavens is a terrifying skill, however — all techniques come with glaring flaws. They are not omnipotent so Mu Shen was about to learn those flaws by simply drawing close to the serpent. Only by learning those flaws will he be able to break them.
What Shi Feng had told him was actually startling. The heavens was so vast that countless parallel universes combined together is not enough to exhaust its vastness; however , something could actually lock the heavens. Meaning that, if the Serpent successfully used Locking The Heavens on them, it would be Impossible to escape from it.
The Serpent's body recoiled and slapped down with tremendous force that overturned the earth completely.
The thing is — Locking the Heavens needed a lot of concentration and focus. Without focus or deep concentration, it would be difficult to lock something as boundless as the heavens.
And suddenly, Mu Shen realized.
The Serpent had been unable to Lock the Heavens due to poor focus.