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Diablo 4 Item Upgrades The upgrade to an item allows players to raise the level of their equippable items such as trinkets, armor, weapons and weapons above a certain threshold. They can be purchased at any item upgrader NPC with the appropriate currency. are used to add upgrades to equipment to increase attributes and bonuses, as well as other effects. They are generally slot-restricted, but there are certain universal upgrades. Rerolling In Diablo 4, a player can reroll a item upgrade. This is