The rarity of Key to the Bone Ruins is Uncommon. At this moment the item is available for trade.
Key to the Bone Ruins is a skin for Meepo. The skin was added to the game on April 23, 2013, it was created by ashdoodles.
Key to the Bone Ruins is currently one of the most popular skins, but it is rarely seen in the game due to its high price.