The rarity of Raiments of the Obsidian Forge is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Raiments of the Obsidian Forge is a skin for Underlord. The skin was added to the game on July 19, 2018, it was created by TG.
Raiments of the Obsidian Forge is currently one of the most popular skins, but it is rarely seen in the game due to its high price.