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Diablo 4 Item Upgrades Upgrades to items let players increase the item level of equippable items like weapons or armor, as well as trinkets up to a certain amount. You can upgrade items at any NPC that accepts the appropriate currency. Upgrade components are slotted into equipment to offer attributes bonuses and other effects. Most upgrades are slot-restricted but some are universal. Rerolling In Diablo 4, a player can roll a new upgrade to an item. This is accomplished through the Level Up mechanic, which pauses the gam