(They showed them in the stream. You have to be high level to use them. They are basically a thing that gives you interesting perks. The damned lute is a legendary artifact available for warlocks. When you are on destiny you should see a locked area under your class item in your inventory. That's were your artifacts go. Just search some video) *Cregan puts The damned lute away and begins to walk away* "A -blam!-ing lute!" *He leaves the area*