Only Chaos Dwarf sorcerers can use Chaos Dwarf Magic and this is the only kind of magic that they know. Chaos Dwarf Magic is based around the corrupt rituals of the evil god Hashut, the patron deity of the Chaos Dwarf race.
Chaos Dwarf spells are dealt to Chaos Dwarf sorcerers before the game in the normal way, and in other respects they follow the same rules as Battle Magic.