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Item Upgrading and Rerolling in World of Warcraft Upgrades can be made to items to improve their performance. Upgrades to gear are important especially in the beginning of. Start by upgrading BiS (Best-in-Slot) items before working on other equipment pieces that will fit your game plan. The process of upgrading an item is accomplished by using Upgrade Tokens to fund the item's upgrade window. The number of upgrade slots varies by item type. Upgrade components Upgrade components are unique items that can be put int