The rarity of Samurai Soul is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Samurai Soul is a skin for Earthshaker. The skin was added to the game on August 13, 2014, it was created by Perfect World.
Samurai Soul is currently one of the most popular skins, but it is rarely seen in the game due to its high price.