Minding my own business in Dalaran (Wrath version) and this guy appears with a quest icon over his head. Says I, “this looks interesting” so I clicked on him.
After that, I looked him up on WoWHead.
Maybe I should have done that first, since he shortly disappeared. Turns out that he’s summoned by using the special mount that you get when you buy the deluxe version of Shadowlands.
So basically the only way I will be able to turn in the quest, assuming it completes, is if someone near me summons him. I think. It would be just typical if I couldn’t actually turn in.
I thought about dropping it, but I think I’ll hang on to it and see what happens.