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Genshin Impact - The Basics of Item Upgrading in Genshin Impact The primary method to boost the stats of weapons and armor and the stats of a character or ship. When an item is upgraded, its rarity and iLevel rise, as well as any other modifiers it may have. Some items can only be upgraded using an exclusive resource. These resources can be looted from small loot box or found in the world. Rerolling There are several ways to reroll Genshin Impact, though many players feel that the time and effort required