The Pact Stone Pyramid (3e)
An Osirian noblewoman has discovered the lost pyramid of Ahn'Selota buried beneath the shifting desert sands. Hidden within it is a great magic that allowed the Four Pharaohs of Ascension to rule the land. If this corrupt sorceress gets her hands on this power¸ she'll bring back the ancient pharaohs and rule beside them¸ eradicating the current government in Osirion and plunging the region into immortal despotism. With tens of thousands of lives at stake¸ the only way for the PCs to stop her is to find the source of the magic before she does and destroy it - or steal it for themselves.