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Item Upgrading and Rerolling in World of Warcraft Upgrades can be added to items to boost their effectiveness. Gear upgrades are crucial especially in the beginning of. Start by upgrading BiS (Best-in-Slot) items and then work on other pieces of equipment that fit your build. Upgrades to items are made by using Upgrade Tokens to fund the item's upgrade window. The number of upgrade slots is different according to the type of item. Upgrade components Upgrade components are specialized items that can be added to armors, weapons trinkets, weapons, and