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Diablo 4 Item Upgrades The upgrade of an item allows players to raise the level of equipped items like trinkets, weapons, and armor above a certain threshold. They can be obtained at any upgrader NPC using the appropriate currency. Slots are used to add components to upgrade equipment in order to gain attributes and bonuses, as well as other effects. The majority of these 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 through the Level Up mechanic, which pauses the game and