Tower Defense (quest)

Objectives
Collect 20 Animatable Stone at the Lion's Landing Quarry from Bilgewater Goblins or by destroying stone slabs there with collateral damage.
 * Animatable Stone x20

Description
The gnomes are running our quarry operation to the northwest. The stone there is especially tough - the gnomes tell me the mogu used it to fashion their constructs. I don't know. What I do know is that we use that stone to build our towers, and the Horde has dispatched the Bilgewater goblins to steal it from us. Get out there and get some back. By the way - collateral damage may break up the stone slabs there. If so, pick that up, too.

Rewards
You will receive:

Progress
You brought us the stone yet?

Completion
Alright! We'll get that stone mortared into the cracks in our walls faster than a dwarf downs a pint.

Gains

 * 236000 XP
 * +150 reputation with Operation: Shieldwall