Speak with Bouldercrag the Rockshaper at Bouldercrag's Refuge.
The Earthen who once inhabited, built, and maintained Ulduar were ousted from their home when Loken took over the city. Since then, his iron dwarf followers have relentlessly attacked the exiles.
They have taken refuge in an old titan building, which they now call Bouldercrag's Refuge, on the face of a mountain west of the Inventor's Library. Bouldercrag and his brethren fight to keep the irons from overrunning their haven, but they cannot hold their ground long. Find and help them, <name>.
You will receive: 74
So you know Brann Bronzebeard, then? He is our closest ally among those of the flesh. We are as brothers in the struggle against Loken and his followers, in the struggle for Ulduar.
This breadcrumb is offered by Brann after completing Norgannon's Shell.
Bouldercrag's Refuge is found at [30.4, 36.7].
-  The Earthen of Ulduar or  The Exiles of Ulduar
-  Rare Earth
-  Relief for the Fallen &  Fighting Back
-  Slaves of the Stormforged &  The Dark Ore
-  The Gifts of Loken &  Facing the Storm
While killing golems, loot the [Dark Armor Plate] to continue the quest chain.
-  Armor of Darkness
-  The Armor's Secrets
-  Valduran the Stormborn
-  Destroy the Forges! &  Hit Them Where it Hurts
-  A Colossal Threat
-  The Heart of the Storm
-  The Iron Colossus