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Item Upgrading and Rerolling in World of Warcraft Upgrades can be added to items to boost their effectiveness. Upgrades to gear are important especially in the beginning of. Upgrade your BiS (Best in Slot) items first, then move on to other items that are compatible with your style. Upgrade tokens can be used on the item's upgrade window to upgrade it. The number of upgrade slots is different by item type. Upgrade components Upgrade components are items that can be slotted into armor, weapons trinkets, gathering tools and trinkets. Each u