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Genshin Impact - The Basics of Item Upgrading in Genshin Impact Item upgrading is the primary method of boosting weapon/armor stats and the stats of a character or ship. When an item is upgraded, its rarity and iLevel rise and so do any extra modifiers it may have. Some items require a special resource to upgrade. These resources can be found in the world or by looting minor loot chests. Rerolling There are a number of ways to reroll in Genshin Impact, though many players find that the time and effort required to do so makes it impossible. The most popular method