Ming, Yi

Ming Yi, also known as Earth Master Yi (地师仪, Dì Shī Yí), is one of the Five Elemental Masters in the Heavenly Court. The mortal realm prays to him before any major constructions and wishes for successful labor work.

[Spoiler] It turns out that the real Ming Yi was ambushed long ago and the man currently impersonating him is actually He Xuan, a ghost of Supreme rank and one of the Four Great Calamities, "Ship-Sinking Black Water". [/Spoiler]

(Source: Heaven Official's Blessing Wiki)