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Item Upgrading and Rerolling in World of Warcraft Items can be upgraded to boost their stats. Upgrades are important for gear, especially in the early stages of the game. Upgrade your BiS (Best in Slot) items first, then proceed to other items that are compatible with your style. Upgrades to items are made by spending Upgrade Tokens on the item's upgrade window. The slots for upgrade are different depending on the item type. Upgrade components Upgrade components are unique item