Vaal Orb

Vaal Orbs are a currency item that can corrupt an item, adding unpredictable and powerful results but preventing the item from being modified with currency.

As Atziri's influence spreads, exiles are increasingly driven by the temptation to corrupt their own equipment with Vaal Orbs. While corrupting an item can yield unpredictable and powerful results, it prevents later modification to the item (corrupted items cannot have further currency applied to them). Corruption yields one of many possible outcomes and has different effects depending on what type of item it is.

Corruption is currently the only way to obtain white sockets, certain implicit mods, gems with level or quality higher than 20, maps with eight mods, and various other exotic item states.