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Item Upgrading and Rerolling in World of Warcraft Upgrades can be added to items to boost their effectiveness. Gear upgrades are crucial especially in the beginning of. Begin by upgrading BiS (Best-in-Slot) items before working on other pieces of equipment that fit your game plan. Upgrade Tokens can be used in the upgrade window of an item to upgrade it. The slots available for upgrading vary depending on the item type. Upgrade components U