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Genshin Impact - The Basics of Item Upgrading in Genshin Impact The primary method of increasing the stats of weapon/armor and character/ship stats. When an item is upgraded, its rarity and iLevel rise and so do any other modifiers it may possess. Some items require a special resource to upgrade. These resources can be obtained from small loot boxes or found in the world. Rerolling There are many methods to reroll in Genshin Impact, though many players are of the op