The term 'Sorcerer' is used to describe Wizards who follow the Chaos Gods. Sorcerers are unusual in that they wear Chaos armour and use magic shields or magic armour just like other Champions of Chaos. This can make them formidable close combat opponents as well as masters of the Magic phase - a combination that is rare indeed in the armies of lesser mortals.
Sorcerers may choose their spells from the Lores noted in their army list entry.
Sorcerers with a Mark of Chaos always generate spells from the Lore appropriate to that mark; for example, a Sorcerer with the Mark of Tzeentch generates spells from the Lore of Tzeentch.