Mortlach 15 Year Six Kingdoms is part of Diageos Game of Thrones series, released to commemorate the final season. Distilled at Mortlach in Dufftown (Speyside), it is aged for 15 years. The maturation is mainly in first-fill Oloroso sherry casks, with a finish in ex-bourbon barrels. Bottled at 46% ABV (92 proof), this whisky aims to balance rich sherried fruit and sweetness with oak, spice, and a bit of smoky / leathery depth.