How Did Anubis become lord of the dead

In the earliest period of Egyptian religion Anubis was clearly the lord of the dead and Osiris the embalmed god while Anubis performed the act of embalming. Titles that were invested unto Osiris — such as Khenty-Imentiu or “Foremost of Westerners” — were originally Anubis’s. As the drama of Osiris’s death and vindication unfolded over the centuries, Anubis assumed the role of the guide who holds steady the scales on which their hearts are measured against the feather of ma’at as “He Who Counts the Hearts”.