The rarity of Enveloping Despair is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Enveloping Despair is a skin for Abaddon. The skin was added to the game on January 6, 2016, it was created by LVL45.
Enveloping Despair has been recently added to the game, which makes it rather popular with the game community.