The rarity of Golden Nether Lord's Regalia Set is Mythical. At this moment the item is available for trade.
Golden Nether Lord's Regalia Set is a skin for Pugna. The skin was added to the game on August 10, 2016, it was created by Robo.
Golden Nether Lord's Regalia Set has been recently added to the game, which makes it rather popular with the game community.