The rarity of Helm of the Chaos Wastes is Uncommon. At this moment the item is available for trade.
Helm of the Chaos Wastes is a skin for Beastmaster. The skin was added to the game on August 22, 2016, it was created by Keanhotshine.
Helm of the Chaos Wastes has been recently added to the game, which makes it rather popular with the game community.