The rarity of Everlasting Heat is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Everlasting Heat is a skin for Lina. The skin was added to the game on May 15, 2014, it was created by AutumnWindz.
Everlasting Heat has been recently added to the game, which makes it rather popular with the game community.