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What Are Item Upgrades in Genshin Impact? Item upgrades are items that can be put into weapons, armor trinkets, gathering tools and trinkets to add effects or stats. They can be purchased from vendors, traded between players or as rewards. It's generally an excellent idea to upgrade equipment, especially when it's unique or rare. However, it's possible to over-upgrade items especially if they are equipped with very high requirements for base equipment. Rerolling There are several ways to build up your gear in