Appearance history
The rarity of Book of the Infernal Maw is Mythical. At this moment the item is available for trade.
Skin Features
Book of the Infernal Maw is a skin for Warlock. The skin was added to the game on September 16, 2016, it was created by growl.
Skin popularity
Book of the Infernal Maw has been recently added to the game, which makes it rather popular with the game community.