The Taiyin Hunyuan Ancestor had been wounded by the Invisible Sword in his Primordial Spirit after the second swordfight at Yellow Mountain, so he returned to Wutai Mountain to calmly calculate the causes and effects. He discovered that his fate was meant to end with this event!
As a person fated to face this calamity, calculating his own fate beforehand would surely bring about various chaotic signs, making accurate predictions impossible. He hoped he could control his own destiny and find an opportunity to overturn the fixed outcome within the variables.
Before the swordfight, he had calculated that his calamity was imminent, but believed himself unbeatable armed with the Five Poison Immortal Sword and the Taiyin Five Smoke Net, denying any reason for him to meet this fate.
After the swordfight, although injured, he thought he had safely survived the disaster through his own abilities.