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Diablo 4 Item Upgrades Item upgrades allow players to increase the level of equippable items such as weapons or armor, as well as trinkets up to a certain amount. They can be obtained at any NPC with the appropriate currency. Upgrade components are slotted into equipment to offer bonus effects and attribute bonuses. They are generally slot-restricted, but there are some universal upgrades. Rerolling A player can reroll an item upgrade in Diablo 4. This is accomplished by using the Level Up feature, which