The rarity of Adage of the Smoldering Sage is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Adage of the Smoldering Sage is a skin for Ember Spirit. The skin was added to the game on January 11, 2017, it was created by Don Don.
Adage of the Smoldering Sage has been recently added to the game, which makes it rather popular with the game community.