The rarity of Flight of the Marauding Pyro is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Flight of the Marauding Pyro is a skin for Batrider. The skin was added to the game on June 24, 2015, it was created by DNADota.
Flight of the Marauding Pyro has been recently added to the game, which makes it rather popular with the game community.