From publisher blurb:
The Amenti are Reborn!
The Amenti are the latest incarnations of the undying servants of Osiris, detailed in Mummy: The Resurrection. They have fought Apophis and his vile minions for millennia and have been given renewed vigor through the new Spell of Life. The souls of ancient defenders of Ma’at have joined with residents of the modern world to save humanity from the forces of darkness.
The Amenti are not alone.
Ancient allies support the mummies. The Cult of Isis guards secret knowledge and the Spell of Life. The enigmatic vampires who called themselves Children of Osiris have been freed from their undead curse. Together, they have rebuilt the mighty temple and reach out beyond the Lands of Faith.
Pillars of Ma’at includes:
Suggestions for resolving the use of Mummy: The Resurrection without previous Metaplot
A look into the organization of The Cult of Isis and how it can benefit Mummy characters, including rules for playing the sacred leaders of The Temple.
The Asaru, the Children of Osiris who were judged and resurrected as mortal allies for Mummy characters. Including rules for playing the former vampires.
Dendur Gardens, an example location of the Cult of Isis outside the Web of Faith