The rarity of Bladed Abdomen of the Brood Queen is Uncommon. At this moment the item is available for trade.
Bladed Abdomen of the Brood Queen is a skin for Broodmother. The skin was added to the game on Invalid Date, it was created by 7thBattery.
Bladed Abdomen of the Brood Queen has been recently added to the game, which makes it rather popular with the game community.