Dark orb that increases the power of elemental magic.Final Fantasy V description
Chaos Orb is an accessory obtained by defeating Archeodemon. It provides 8 Magic, 10 Magic Defense, 1 Weight, increases the power of all elemental attacks except Water by 50%, the user starts battles with the Sap status unless they have the Undead ability equipped or is in the Necromancer class, where instead they will have the Regen status. The accessory is only available in the Advance and later ports of the game.
Chaos refers to the void state preceding the creation of the universe in Greek creation myths, or to the initial "gap" created by the original separation of heaven and earth. Chaos also refers to a state of disorder, disharmony, dissonance, lawlessness, and unpredictability.