He was one of the Seventh Grade Demon Cultivators from Feather Demon City who managed to survive under the protection of the Black Demon Flower.
"However, according to investigations afterward, the Sword Cultivator who attacked the city was the Young Sect Leader of the Human Race Sword Sect, named Lu Qingshan," the Demon Cultivator from Feather Demon City said with lingering fear, "The reason he never used the Law Domain, according to the Human Race, is because he's still a Cultivator in the Sixth Realm and hasn't formed a Law Domain yet."
The battle achievements of Lu Qingshan at Yumen Pass were widely publicized, becoming almost universally known. It's no surprise that the Demon Race knew some inside information in such a scenario.
"A Sixth Realm Cultivator wiped out almost everyone in your Feather Demon City?" Desiccated Dragon Demon Marshal frowned and asked.