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Diablo 4 Item Upgrades Upgrades to items let players increase the item level of items that can be equipped, such as weapons, armor, and trinkets to a certain level. They can be obtained at any upgrader NPC with the appropriate currency. Slots are used to components to upgrade equipment to gain attributes and bonuses, as well as other effects. Most upgrades are slot-restricted however some are universal. Rerolling In Diablo 4, a player can roll a new upgrade to an item. This is done th