Belated happy 1000 pages!
Just want to say that you guys are all wonderful and I've loved swapping theories and commiserating in this thread
. I'm a bit sad that I have work today and won't be able to lurk around...
Anyway, I updated the playlist of songs mentioned in the thread and if anyone is interested made a youtube playlist so you can listen to all the songs all you like (I'm thinking about re-ordering the songs in the latter so the progression makes a little more sense, but for now they're in the order they appeared on in the thread).
I think it's bugged. I've never gotten it either. Only got his amulet quest once and not my second playthrough, also.
It is bugged in my game. If you find ten artifacts you should get a war table mission (following that, you go out into the world and close a big fade rift). I reported it here if you want to log yours as bugged too.