Black dragon tail-bone

The Black dragon tail-bone is an item on the Odd Old Man's wishlist after the Fur 'n' Seek quest, and is dropped by Black Dragons and the King Black Dragon. It shouldn't take more than 20 kills to get a bone drop. 8 other tail bones are needed from Green Dragons, Blue Dragons, Red Dragons, Bronze Dragons, Iron Dragons, Steel Dragons, Mithril Dragons and Skeletal Wyverns to complete this miniquest.