Iron dragon tail-bone

The iron dragon tail-bone is an item on the Odd Old Man's wishlist after the Fur 'n' Seek quest, and is dropped by iron dragons. 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, bronze dragons, steel dragons, mithril dragons and skeletal wyverns to complete this miniquest.