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What Are Item Upgrades in Genshin Impact? Item upgrades can be added to weapons, armors, trinkets, and gathering tools. They provide additional stats, or extra effects. These upgrades can be purchased from vendors, traded between players or as rewards. It's generally recommended to upgrade equipment, especially in the case of items that are unique or rare. However, it's possible to over-upgrade items especially if they are equipped with very high requirements for base equipment. Rerolling Genshin Impact offers a few diff