The rarity of The Grey Gallant is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
The Grey Gallant is a skin for Omniknight. The skin was added to the game on April 1, 2015, it was created by katzeimsack.
The Grey Gallant has been recently added to the game, which makes it rather popular with the game community.