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Item Upgrading and Rerolling in World of Warcraft Items can be upgraded to increase their stats. Upgrades to gear are essential, especially early on. Begin by upgrading BiS (Best-in-Slot) items and then work on other items that are compatible with your style. The process of upgrading an item is accomplished by spending Upgrade tokens in the upgrade window of an item. The number of upgrade slots is different depending on the type of item. Upgrade components Upgrade components are special items that can be added to armors, weapons trinkets, weapons, and gatheri