The rarity of Armor of the Unyielding Mask is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Armor of the Unyielding Mask is a skin for Juggernaut. The skin was added to the game on May 20, 2015, it was created by 澈水.
Armor of the Unyielding Mask has been recently added to the game, which makes it rather popular with the game community.