Board Thread:Suggestions forum/@comment-27831234-20180605023747/@comment-26149161-20180605113435

Gobel Mirlond is non-canon, as Tharaerel said. However, Mumakil bone blocks would probably work, providing they weren't enormous--Mumaks were only about 7 meters tall, after all.

Ithilion, Discussions Moderator (Auta i lómë)