The head Wizard tells your group of a mystical item called "The eye of Horus".  Horus is the son of Osiris and is the sworn enemy of Seth.  Seth and Osiris are brothers who a long time ago were good friends.  But Seth wanted more power and killed Osiris.  But Osiris rose from the dead, and Horus has avenged his father's death at every opprotuninty.  Surely, Horus will help a group of Adventurers he deems worthy.