From the start to the end, Chu Yunfan had crushed Wang Yifan. Even after Wang Yifan became a demon and his strength increased dramatically, he was still no match for Chu Yunfan. He was crushed in minutes.
This was true foundation and power.
After his head was cut off, even though Wang Yifan's demonic body was very tenacious, it was useless. If his head was gone, he was dead. The demonic energy that was gushing out of his body dissipated and no longer condensed.
The demon seed in his body also disappeared without a trace. The seed could save him once, but it could not save him a second time. Even if he was resurrected again, Chu Yunfan was absolutely confident that he could kill him. Compared to the previous situation, there had been a fundamental change.