Back when Fire Cloud Sect wiped out Wind Blade Sect, they cleared out the elite disciples of Wind Blade Sect entirely, leaving only some insignificant menial servant disciples to flee.
Those menial servant disciples lived in remote areas far from the sect's main grounds, spending their days buried in work, completely unaware of any major events happening within the sect, let alone important figures like Lie's father and son visiting Wind Blade Sect.
Demon Flame Sect didn't gather much information from those fleeing menial servants of Wind Blade Sect. It was only after sending people to investigate that they learned Fire Cloud Sect joined forces with a strong person named Fang Bai to jointly destroy Wind Blade Sect.
As for the fact that Lie Yao and Lie Shijie were killed by Fang Bai, except for a few higher-ups in Fire Cloud Sect, no one else knew at all.
