The rarity of Mace of the Endless Plane is Rare. At this moment the item is available for trade.
Mace of the Endless Plane is a skin for Faceless Void. The skin was added to the game on Invalid Date, it was created by blossomalex.
Mace of the Endless Plane is currently one of the most popular skins, but it is rarely seen in the game due to its high price.