Vaal Orb is the most "mysterious" Orb in the Path of Exile. When used on an item, Vaal Orb will corrupt it, giving unpredictable results and disabling the possibility of further enhancing or altering the Item via other Orbs. Since there are a lot of ways the item can be changed after using Vaal Orb, and it's impossible to predict the outcome, using Vaal Orbs on your equipment is a real gamble. Most players will use it as the finishing touch, to give their items a chance to gain an additional powerful property. Vaal Orb, like the majority of other Orbs in Path of Exile, can be looted from slain monsters on most levels. It has a slightly lower drop chance than Chaos Orb, but since you can't repeatedly use it on your equipment or other consumables, they are pretty much of an equal value. Vaal Orb can be also obtained via the Vaal Orb Recipe, which requires you to vendor 7 Vaal Skill Gems and a random Vaal Sacrifice Fragment. It, however, doesn't seem like a trade to thrive for and can be ignored.
As mentioned, if you buy Vaal Orb and use it on a piece of equipment, it can have a number of different results depending on the item you use it on. Below you can see all the possible effects on the items Vaal Orb can be used on with a brief description. The potential, most profitable results have also been listed. When it comes to general equipment, Vaal Orb can:
Players can also corrupt Maps which is quite common since it can't render the item useless, but will always grant them additional effects. Even if Vaal Orb doesn't change any of the properties on a Map, all Corrupted Map Bosses have a chance to drop Vaal Fragment when slain. When it comes to Maps, Vaal Orb can:
Corrupting Gems is also possible in Path of Exile, which is the best way to obtain their corresponding Vaal Gems, and it's one of the ways to upgrade your Gems above their maximum level and Quality percentage to above 20. When using a Vaal Orb on a Skill or Support Gem the possible outcomes are:
The last group of items that can be altered using Vaal Orbs is Jewels. Since Jewels do not initially carry any Implicit modifiers, it's a great way to slightly upgrade them. However, as usual, it's not the only possible outcome. If you use Vaal Orb on a jewel these are the potential results:
Players can even use Vaal Orbs to corrupt Strongboxes. As a result, some of the items in the Strongbox will drop Corrupted and at the same time, identified. Flasks, Currencies, Essences, Fossils, Resonators, Fragments, and Quest Items cannot be corrupted using a Vaal Orb.
While Vaal Orbs can multiply the value of items you Corrupt, it makes any player unable to change it further by any mean. It cannot be modified in any way, except for changing the sockets via Crafting Bench. This means you should be fully aware of the possible outcome and accept the risk. After all, using Vaal Orb is a complete gamble. You can buy Vaal Orbs from other players with the use of real cash on the Odealo market. On Odealo you can find Vaal Orbs for sale on all the platforms available including PC, Xbox One, and PS4. Since you can buy it directly from other players, you can expect the lowest prices and with fast delivery times. Buying Vaal Orbs from regular players with real money is also the most secure way to participate in this type of trades.