Blackened Limited Edition Signed Bottle is a hand-signed release of Blackened American Whiskey, the collaboration between Metallica and master distillers built around aged bourbon and rye whiskeys finished in black brandy casks. Blackened runs its whiskey through a proprietary sonic-enhancement process, using low-frequency sound to agitate the barrel and speed up wood interaction. The result leans smoky and dark against caramel, vanilla, and oak, with the brandy cask adding a fruited edge. This bottling adds a hand signature and a certificate of authenticity, built as much for the shelf as the pour. Bottled at 45% ABV, 90 proof. A collector’s pick worth holding onto even after it’s empty.