Blackadder Black Snake is from an undisclosed distillery. The spirit is matured in ex-bourbon barrels. They then put 3 of those barrels into an Oloroso Sherry Butt and mature for another year. This Sherry Butt is treated like a mini-Solera cask in that they only bottle 2/3 of the cask. They then add 2 more ex-bourbon barrels, of the same whisky, to the Vat. Each bottling is called a “Venom.” And the whisky gains overall age with each Venom. Third Venom: The Blackadder Black Snake Vat No. 6 First Venom is a remarkable single malt whisky bottled by the independent bottler Blackadder. A few casks single malt whisky, distillery unknown, have been married and matured in 2 ex-sherry casks according to the Solera system. This is the fourth batch (Fourth Venom) from the 6th cask. Bottled at natural cask strength.