|Anime • Manga|
|User||Medusa Gorgon, Death the Kid, Noah (Wrath), Crona|
|Manga Debut||Chapter 34|
|Anime Debut||Episode 34|
BREW, also known as The Tempest, is said to be the most powerful creation of Eibon and is possibly the most powerful Demon Tool within Soul Eater. It is explained by Noah that BREW and The Book of Eibon are the wisdom of Eibon — essentially Eibon himself.
BREW is a bright cubed shaped demon tool consisting of many markings, possibly ancient writing or text. In the anime, the appears is different. It is a blue cubed in which has a keyhole and screws on the sides.
In the manga, one of the various abilities the demon tool has is Soul Amplification, in which is able to amplify the power of one's Soul Wavelength. Death the Kid unknowingly used this ability to connect one of his Lines of Sanzu.  Along with Soul Amplification, BREW also is able to merge two being into one, shown when Noah (Wrath) merged with a giant art, making him powerful enough to stand up to Asura and even gain the upperhand. In the anime, it had the ability to realize the user's own desires and can only be activated with the use of the Key.
Eight hundred years before the start of the series, BREW was located in the Lost Island and was thought to have been destroyed by an accident that annihilated the entire facility and its population along with it. This was all caused by Arachne, who wanted to erase it from that era after she collected its blueprints. This, however, was not enough to destroy Eibon's greatest creation.
A significant battle occurred between the forces of The DWMA and Arachnophobia over the possession of BREW on the Lost Island. At first, it is thought that Arachnophobia won the battle but, ultimately, it was Medusa who managed to obtain BREW.. She had Eruka and the Mizune sisters take it, unnoticed during the battle and replaced it with a fake one.