Chaos magics (also known as chaos energies) are the magics of the Burning Legion. The fallen titan Sargeras created this vast demonic army to scour all creation. The Burning Legion moves from world to world, decimating everything in its path with devastating fel magic. No one knows exactly how many worlds and mortal civilizations the demons have annihilated in their unholy Burning Crusade.
Professions of the Cosmos
Chaos energy is highly dangerous; some believe it actually is equivalent to arcane magic. Thought at first to be magical, as it can sometimes mimic the effects of arcane magic, chaos energy is purely mechanical in nature. Chaos energy has the power to disrupt the power of arcane magic and, in this case, free someone from its thrall.
Chaos energy can be harnessed by tinkers. The harnessing of chaos energy has given tinkers a more level playing field when dealing with a world of arcane magic.