I know, it was a random shot in the dark. The fairies in WW lead you to get the elixer soup. (That's one hearty soup!)
Since if I didn't guess I'd be wasting this post... those glasses things from WW that let's you see your enemies health.
I didn't get it yet... what? (Yes, I pretty much just wanted to link a Doctor Who.)
I guess either the New Hero's Clothes or the Guard's notebook from PH.