The rarity of Sovereign of the Kray Legions is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Sovereign of the Kray Legions is a skin for Sand King. The skin was added to the game on May 22, 2017, it was created by LaughingSkyPig.
Sovereign of the Kray Legions is currently one of the most popular skins, but it is rarely seen in the game due to its high price.