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World of Warcraft - Item Upgrade The upgrade feature for items allows players to boost the item level of equippable weapons or armor. This boosts the power of the equipment, and also sometimes adding buffs or rolling an affix again. It is important to remember that while you can upgrade magic and common equipment, it's generally not worth the cost. Rare and unique gear will quickly outclass upgraded magic and common gear. Cost When a player decides to upgrade an item, they must spend Gold to do so. The cost of upgrading an item is based on the item's