The rarity of Sorcerer of the Black Pool is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Sorcerer of the Black Pool is a skin for Lich. The skin was added to the game on September 15, 2014, it was created by Cersei Lannister.
Sorcerer of the Black Pool is currently one of the most popular skins, but it is rarely seen in the game due to its high price.