Bring a Mana Potion, Coal, and Sweet Nectar to Talvash del Kissel in Ironforge to get a replacement for Talvash's Phial of Scrying.
Um... you need another phial of scrying? You're kidding, right? What did you do with the first one?! We have a lot of work ahead of us here, [race]. Those phials don't grow on trees! Actually, I wish they did, because I'd go there and pick one off since I don't have another one!!
in order to make you one, I need the following: a mana potion, a piece of coal, and some sweet nectar. Don't ask why, just bring me what I ask and I'll make you a new one.