The rarity of Corridan Maestro is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Corridan Maestro is a skin for Storm Spirit. The skin was added to the game on September 14, 2016, it was created by Chemical Alia.
Corridan Maestro is currently one of the most popular skins, but it is rarely seen in the game due to its high price.