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