The rarity of Barding of the Soul Keeper is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Barding of the Soul Keeper is a skin for Visage. The skin was added to the game on January 18, 2017, it was created by Zaphk.
Barding of the Soul Keeper has been recently added to the game, which makes it rather popular with the game community.