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Diablo 4 Item Upgrades Item upgrades allow players to increase the level of items that can be equipped, such as weapons or armor, as well trinkets up to a certain amount. You can upgrade items at any NPC that accepts the appropriate currency. Upgrade components are integrated into equipment to give attribute bonuses and extra effects. of these upgrades are slot-restricted but some are universal. Rerolling In Diablo 4, a player can roll a new upgrade to an item. This is