Each code, once redeemed through the in-game Shift menu, rewards you with Borderlands 4 Boosting a handful of Golden Keys. Occasionally, they may also grant cosmetic skins or heads. Using Golden Keys Wisely Golden Keys are one-time use and account-wide. Once you spend a key, it's gone forever. This means you should be strategic about when to open Golden Chests. Save for Endgame: Many Vault...