Many Great Divine Transcendents watching the battle in secret were already shaken to the core, contemplating how if they were in Jiang Chen's situation, they would have probably already been slain by the Primordial Heavenly Sovereign.
Don't assume that just because Jiang Chen is unscathed through the phase where Chaos is about to differentiate but has not, and Heaven and Earth are about to open but have not, that this phase is very safe. In fact, it is quite the opposite; this stage is precisely when the reaction of Chaos is most intense.
Because it senses the impending destruction, Chaos will mobilize all its power to resist and swallow everything in existence. Jiang Chen is unharmed because he is strong enough, with an undying and imperishable body, fearless in the face of Chaos.
If it were someone else, even a Daluo Jinxian of the Primordial, as long as they have not achieved a physical body Dao, they would be devoured without the protection of supreme treasures.