This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Answer Parqual Fintallas' question successfully and then speak to him again. He will remain in the Undercity until you are ready.
Answer Parqual Fintallas' question correctly (1)
So the time is once again upon us. As a student of lore, you have shown great tenacity by undertaking my task.
And so now I offer you your question. If you are ready, speak to me again, and take all the time you need, <name>--there is no pressure to answer quickly.