Nogmeldir recalled a special draught which Gandalf the Grey mentioned using in his fireworks to enhance their power.
'It would seem that there are indeed some limits to the ingenuity of dwarves, Master Eywind. Fortunately, I happen to know a Wizard who is far wiser than either of us -- particularly when it comes to matters of fire.
'I remember many years ago when Mithrandir would come to Rivendell to celebrate momentous events with us, and often his fireworks would be central to the evening festivities. It so happens that in discussing the nature of his fireworks, he mentioned a draught which he uses to enhance the virtue of his displays.
'It occurs to me now that if we happened to have a bit of this draught on hand, we might make excellent use of it when it comes time to deal with these goblins and their fire-pots once and for all.'
Gandalf is in Bilbo's room on the ground floor of the Last Homely House, in Rivendell.
Nogmeldir has asked you to travel into Rivendell to the west of the Misty Mountains and retrieve a special draught from Gandalf the Grey.
Nogmeldir is at Vindurhal in northern High-pass.
Gandalf the Grey gave you a special draught he had prepared, which you should take to Nogmeldir.