The rarity of Twin Blades Assassin is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Twin Blades Assassin is a skin for Bounty Hunter. The skin was added to the game on May 28, 2014, it was created by motenai.
Twin Blades Assassin is currently one of the most popular skins, but it is rarely seen in the game due to its high price.