The rarity of Onyx Lotus is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Onyx Lotus is a skin for Templar Assassin. The skin was added to the game on February 24, 2015, it was created by Sith Happens.
Onyx Lotus is currently one of the most popular skins, but it is rarely seen in the game due to its high price.