Ye Fan was well aware that the crimson-golden crown within his body would only actively emerge under two circumstances.
First, when his consciousness (soul) suffered an attack that he couldn't withstand, the crimson-golden crown would promptly appear to protect his consciousness.
Second, when his mind power was completely depleted, the crimson-golden crown would also appear, absorbing Heaven and Earth Primordial Qi at an astonishing rate and transforming it into mind power to replenish himself.
It was this second scenario that Ye Fan had been using for cultivation, achieving a doubly effective result. It was also the main reason why his Flying Knife Assassination possessed the power to kill masters of the Half-step Gang Qi Realm.
Apart from the above situations, Ye Fan had never seen the crimson-golden crown emerge.