Mithril dragon tail-bone

This item is part of the Odd Old Man's wishlist after the Fur 'n' Seek quest, and is dropped by the Mithril 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, Black Dragons, Red Dragons, Iron Dragons, Steel Dragons, Bronze Dragons and Skeletal Wyverns to complete this miniquest.