C1841 Nalan qing er lost contact
The Eighteen Diremonster Formations was an enhanced version of the Twelve Celestial Immortals And Fiends Formation s that were passed down through the Ancient Witch Clan. It was the final version that Ye Qian improved on by fusing the number of Heavenly Dipper and Earth Terminus.
As the inheritor of the Witch Clan, Ye Qian naturally passed down all of these formations to Zhang Hao