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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 early on. Upgrade your BiS (Best in Slot) items first, then proceed to other items that are compatible with your build. Upgrades to items are made by spending Upgrade Tokens on the item's upgrade window. The number of upgrade slots is different depending on the type of item. Upgrade components Upgrade components are items that can be slotted into arm