The rarity of Diadem of the Elder Myth is Mythical. At this moment the item is available for trade.
Diadem of the Elder Myth is a skin for Winter Wyvern. The skin was added to the game on September 16, 2016, it was created by Nateo.
Diadem of the Elder Myth is currently one of the most popular skins, but it is rarely seen in the game due to its high price.