The rarity of Helm of the Guarded Word is Mythical. At this moment the item is available for trade.
Helm of the Guarded Word is a skin for Tusk. The skin was added to the game on February 16, 2018, it was created by Growl.
Helm of the Guarded Word is currently one of the most popular skins, but it is rarely seen in the game due to its high price.