The Chaos Orb is a currency item in Path of Exile. It is used to re-roll all random modifiers on a piece of rare equipment. It can also be used to reforge a unique item into a different unique item of the same item class.

To obtain Chaos Orbs, they can be purchased from other players on the trading website known as Poe.trade. Players can also obtain Chaos Orbs as drops from slain monsters, chests, and destructible containers.

Chaos Orbs can be used to reforge a piece of rare equipment with new random modifiers, reroll the number of sockets on an item, or change an item's socket colors. They can also be used to upgrade a piece of normal item into a rare item with new random modifiers.

Chaos Orbs can also be used to reforge a unique item into a different unique item of the same item class. This will change the stats and bonuses of the original item to those of the new item. This process can be expensive, as the price of the new item will be based on its stats and bonuses.

Finally, Chaos Orbs can be used to purchase certain unique items from vendors. These vendors can often be found in towns, and usually offer a selection of items that can be purchased with Chaos Orbs.