The Oak-Aged Cask is an interesting legendary shield for Borderlands 4 players. Technically, the Oak-Aged Cask can drop anywhere in Borderlands 4, but if you want the best shot at it, we know where the boss that holds it is hiding out. How to farm the Oak-Aged Cask legendary shield in Borderlands 4You can find the Oak-Aged Cask legendary shield in Borderlands 4’s Skull Orchid boss in the Embossed Fault Abandoned Auger Mine. AdIf you’re lucky, the boss will drop a Oak-Aged Cask legendary shield and end your Borderlands 4 grinding. Oak-Aged Cask unique effect and stats in Borderlands 4The Oak-Aged Cask is a pretty decent legendary shield, and is manufactured by Jakobs.