In the Warhammer game spells are represented by cards which are held by individual wizards. Each wizard has the ability to use 1, 2, 3 or 4 spells, depending upon how powerful he is. We assume that the wizard knows many more spells than this, but he only has the aptitude to memorise and prepare a limited number prior to a battle. These spell cards are dealt to each wizard at the start of the game, and can be used by him (or her... or it) during the battle.

There are many different types of magic spell in the Warhammer game. Some are specific to certain races such as Orc Waaagh! Magic and Skaven Magic. The most common kind of magic is called Battle Magic, and for purposes of explanation we'll assume players are using these spells. Battle Magic is used by Empire and Bretonnian armies, High Elves, and some other forces as we shall see.