The rarity of Jiang Shi's Revenge is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Jiang Shi's Revenge is a skin for Lich. The skin was added to the game on January 11, 2017, it was created by Keinhangia.
Jiang Shi's Revenge has been recently added to the game, which makes it rather popular with the game community.