The rarity of Armor of the Shattered Vanguard is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Armor of the Shattered Vanguard is a skin for Axe. The skin was added to the game on January 11, 2017, it was created by Jigglypuff.
Armor of the Shattered Vanguard has been recently added to the game, which makes it rather popular with the game community.