The rarity of Armor of the Onyx Lotus is Uncommon. At this moment the item is available for trade.
Armor of the Onyx Lotus is a skin for Templar Assassin. The skin was added to the game on January 23, 2015, it was created by Sith Happens.
Armor of the Onyx Lotus has been recently added to the game, which makes it rather popular with the game community.