NCF – Extended list of Neutral creatures.

Actually, Chaos magic is a form of primordial magic, not something else, and certainly not its opposite. (Primordial magic is the substance of being from which everything is built, and if something were to be considered the opposite of primordial magic, it would be only emptiness.)
In the first stage of its transformation, primordial magic takes on the forms of chaos or order. Chaos magic, the magic of Urgash and the demons he created (not to be confused with the destructive magic of Heroes 5), belongs to the forms of chaos. This magic is unpredictable, the magic of entropy, formless, constantly changing, and emerged from primordial magic, just like Urgash himself. The six elements created by Ashan from primordial magic can be attributed to the forms of order, as well as such arts of wielding primordial magic as necromancy (in reality, simply binding a spirit to a dead body) and "animating" artificial constructs such as golems. Pure primordial magic, which has not taken on any subsequent form, can include spells that affect space and time (slowing, accelerating, teleportation, "out of time" from Heroes 6, antimagic (removing and immunity to all spells regardless of their affiliation), and the like – that is, everything related to the fundamental aspects of Ashan and not related to a specific element)