The rarity of The Radiance of the Crusade Set is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
The Radiance of the Crusade Set is a skin for Omniknight. The skin was added to the game on Invalid Date, it was created by m00 Elbagast.
The Radiance of the Crusade Set is currently one of the most popular skins, but it is rarely seen in the game due to its high price.