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Item Upgrading and Rerolling in World of Warcraft Upgrades can be added to items to increase their stats. Upgrades to gear are important, especially early on. Upgrade your BiS (Best in Slot) items first, then proceed to other pieces of gear that fit your style. Upgrade tokens can be used in the upgrade window of an item to upgrade it. The amount of slots for upgrading varies according to the type of item. Upgrade components Upgrade components are unique items which can be added to