A Chaos Orbs can be obtained as drops from slain monsters, chests, and destructible containers throughout the game world. They can also be obtained by opening Arcanist's Strongboxes, which are special chests that contain valuable loot.

The main function of Chaos Orbs is to re-roll the random modifiers on items. They can be used to modify the values of explicit modifiers on magic, rare, and unique items. By using a Chaos Orb, players have the opportunity to potentially improve the stats of their equipment or create new combinations of modifiers.

It's important to note that Chaos Orbs only affect modifiers that have a range of possible values. They do not change the tier of the affix, but rather randomize the values within the current tier.

Due to their versatility and scarcity, Chaos Orbs hold significant value in trading and crafting within the player-driven economy of Path of Exile. They are often used as a form of currency to acquire other valuable items or to enhance existing ones.

In summary, Chaos Orbs are a highly sought-after currency item in Path of Exile that can be used to re-roll the values of explicit modifiers on items. They offer players the opportunity to improve their equipment and play a crucial role in the game's trading and crafting systems.