According to Meng Yan, these twin witches hail from the Demon Sky Sect.
The Demon Sky Sect is a renowned sect, comparable to the Cyan Origin Sect and the Celestial Fire Pavilion, though it is not located next to the Qingtian Realm, but several Great Realms away from Qingtian Realm.
In the Immortal Cultivation Realm, a single Great Realm is vast enough; crossing several Great Realms is not something a Foundation Establishment Cultivator can easily accomplish, as dangers often lurk at the borders between the Great Realms.
Rumor has it that sects will pose as Tribulation Cultivators, specializing in robbing and killing cultivators from other places.
There's even quite a record of Golden Core Cultivators being intercepted and killed.
