Let us see what spoilers my crystal ball has in store for you today!
*** Spoiler - click to reveal ***This quest is huge. First you have to go to Siwa and investigate the vault. Then travel North and help at a farm where the peasants have gone strangely mad. Travel North from there to Cyrene.
Inside the akropolis (Which you have to enter through one of the high windows on the side of the building) you will have to do a trippy boss battle against Flavius.
Not hard if you're at least level 33 (Which I highly recommend you be) but he disappears a lot,
Whenever you have it just hit him with Overpower. After his cut-scene in the Duat you return to Egypt and 40 G is yours!
NOTE: For me the quest kept on flitting between LVL 32 & LVL 35. Treat it as a LVL 35 no matter what the quest log says.
Let's keep cheevin' together!