Accumulating vast amounts of gear and loot is what makes Diablo, well, Diablo. Diablo 4 adds in far more weapon customization that any previous installment in the franchise, with a few design quirks players can capitalize on. Player character designs are not left out and also feature some great customization options too. One of those quirks comes along with the new Weapon Upgrades, where boosting Item Power past certain thresholds can result in massive power boosts.