The rarity of Stonemarch Sovereign is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Stonemarch Sovereign is a skin for Wraith King. The skin was added to the game on May 16, 2018, it was created by Nateo.
Stonemarch Sovereign is currently one of the most popular skins, but it is rarely seen in the game due to its high price.