For the people who didn't read the dialog, the whole conversation is as follows.
Therazane says: So small. So soft. It's a wonder you've even lasted this long down here, fleshling.
Therazane says: Or perhaps a testament to your abilities?
Therazane says: All of this for a piece of the World Pillar? What exactly shaman do you intend to do with it?
Earthcaller Torunscar says: We came here to seal da rift Deathwing tore into Azeroth. We need the World Pillar to repair da hole on dis side.
Therazane says: And what then? Will you leave Deepholm to its denizens?
Earthcaller Torunscar says: We'll leave. We've no desire to be stayin' where we're not welcome.
Therazane says: I'm glad you're at least that perceptive.
Therazane says: I propose this: We will march on the Twilight cult and extinguish any utterings of Deathwing's name from this realm. Your Earthen Ring will march with us.
Therazane says: You do this, and I will send Gorsik to the temple with our piece of the World Pillar.
Therazane says: Seal the rift and leave this place.
Earthcaller Torunscar says: We'll be doin' exactly that then. Ya have our tanks, Stonemother.
Therazane says: Save your thanks. We march upon the Twilight Precipice as soon as our forces are gathered. I expect to see you on the battlefield.