On the Blade's Edge

http://www.wowhead.com/?item=31489 and http://www.wowhead.com/?quest=10928
solved my problem.

Hope this helps.

For Horde players, don't forget about Thunderlord Clan Artifact, a drop from the Bladespire ogres in Bladespire Hold. It opens a REALLY long quest chain. Specifically, it's about 13-15 quests long.

Here is a summary of the Usual Suspects:

AH:

Felsworn Mask: http://www.wowhead.com/?quest=10810 (Drop) (9 Quests)
Meeting Note: http://www.wowhead.com/?item=31120 (Drop) (5 Quests)
Orb of the Grishna: http://www.wowhead.com/?item=31489 (Drop) (3 Quests)
Ogri'la Quests (such as http://www.wowhead.com/?quest=11058) do count!
Stasis Chambers of Bash'ir: http://www.wowhead.com/?quest=10974

H

They Stole Me Hookah: http://www.wowhead.com/?quest=10542
Killing the Crawlers: http://www.wowhead.com/?quest=10928

A

Gorgrom's Favor: http://www.wowhead.com/?item=31363 (Drop)
3 Flight Quests from http://www.wowhead.com/?npc=21460

I'll add more as I go.