Jiang Chen knew this was Heaven and Earth testing him; only by overcoming this tribulation could he truly become the Human King, qualified to contend for the position of Human Emperor. If he failed, it would be a great calamity for the Human Race.
At the same time, Jiang Chen also knew this was a test from the Three Sovereigns and Five Emperors, or rather, it meant that he carried the trust of the Three Sovereigns and Five Emperors.
Because the Three Sovereigns and Five Emperors trusted him, they did not choose to resist desperately in the face of the united blockade by the many Great Divine Transcendents of the Mystic Sect, allowing them to seal the Fire Cloud Cave.
The Three Sovereigns and Five Emperors seemed to do nothing, but in reality, they had done much. By sealing them, the Mystic Sect's Great Divine Transcendents were also limiting themselves.