The rarity of Frozen Sigil of the Glacier Sea is Rare. At this moment the item is available for trade.
Frozen Sigil of the Glacier Sea is a skin for Tusk. The skin was added to the game on June 3, 2015, it was created by freeheartex.
Frozen Sigil of the Glacier Sea has been recently added to the game, which makes it rather popular with the game community.