The "Original Body Berserk" is a secret ability inherited by the Dragon Clan. Its duration is determined by the practitioner's realm of insight. Once the duration expires, the effect dissipates, leaving the user in a weakened state. This, consistently, has been the "side effect" of the Original Body Berserk.
Precisely because of this side effect, Di Jue had once assumed he would die at the hands of Duan Lingtian—dying at the hands of someone he had previously considered no more than an ant. He was, naturally, deeply unwilling to accept this.
But what did his unwillingness matter? Reality was stronger than pride. If he had anyone to blame, it was his own carelessness back then for letting Duan Lingtian escape right under his nose.
Chapter 1861