The rarity of Spirethorn Regalia is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Spirethorn Regalia is a skin for Leshrac. The skin was added to the game on September 10, 2015, it was created by Godzy.
Spirethorn Regalia is currently one of the most popular skins, but it is rarely seen in the game due to its high price.