Streza du Vorchass tells you, "You seek to improve your standing with the Society and do some good for your fellows, eh? You can help me by delivering a package for me... We have a discreet cooperative arrangement with a certain sentient undead that lives in the Empyrean Graveyard. Suffice it to say that Massilor the Withered was once a great scholar, and his rotting skull still holds useful knowledge. Seek him out through a portal at the eastern edge of the Empyrean Graveyard. Beware the rats down there."
Streza du Vorchass gives you Supplies for Massilor.