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Item Upgrading and Rerolling in World of Warcraft Items can be upgraded to improve their effectiveness. Gear upgrades are crucial particularly early on. Upgrade your BiS (Best in Slot) items first, and then move on to other pieces of gear that will fit your style. Upgrade Tokens can be used on the item's upgrade window to upgrade it. The number of upgrade slots is different depending on the type of item. Upgrade components Upgrade components are special items that can be slotted into weapons, armor, trinkets and gathering tools. Each upgrade provides a special at