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Item Upgrading and Rerolling in World of Warcraft Upgrades can be added to items to boost their stats. Upgrades to gear are important particularly early on. Begin by upgrading BiS (Best-in-Slot) items, then work on other pieces of equipment that fit your game plan. Item upgrading is done by spending Upgrade tokens in the upgrade window of an item. The slots available for upgrading vary depending on the item type. Upgrade components Upgrade components are specialized items that can be added to armors, weapons trinkets, weapons, or gathering tools. Each upgrade com