I would look into Trevor Talbert's pipes. Out of price range unfortunately, but he's who I'd go to for an evil looking pipe for sure. If anyone can do a ringwraith's pipe it would be him. That being said... I think you just gave me an idea for my next project. Looks like I'll be ordering some more briar soon.
Before you guys get his hopes up, it is worth noting that Trever does not take commission orders for Goblins or Halloween pipes. If you want one you need to sign up for his mailing list and keep a sharp eye.
Talbert for sure, like others said. But as noted, no commissions and the Goblins/Halloween pipes go fast. Actually, all of his pipes go fast, but especially those lines.