Killed incantations of Haas for a password or spell

[Pluvius]

After I killed the 7 incantations of haas in the labyrinth,
i went back to the dragon by the entrance,i forgot his name.
He started telling me that dragon r powerful mages and supposedly teach me some spell or password to get to Murock fast.The narration indicated that the character took some time to understand those words.

Eventually,i still have to walk thru the labyrinth to get to Orc's Murock with the orcs sounding their alarms and teasing me all the way(while i was in Murock).

Checked my spell book,no new scrolls or spells.
Anyone have any idea if there is really a shortcut spell thru the labyrinth to murock given by the good dragoN?