The rarity of Abyssal Vortex is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Abyssal Vortex is a skin for Enigma. The skin was added to the game on May 17, 2017, it was created by Hawf.
Abyssal Vortex has been recently added to the game, which makes it rather popular with the game community.