All spells in the Warhammer Magic game are presented in the form of cards. There are fifteen separate decks of these cards as shown below.

Most wizards can use only one of these decks, but some can use several different decks. For example, an Amber Wizard may use only the Amber spell deck while a High Elf Mage can use any of the colour spells plus the High Magic Spells. This is explained in more detail below.

The first 8 sets of spells, Light to Amber, are known as colour spells. They are used by wizards of the corresponding eight Colleges of Magic as well as by High Wizards.

Tzeentch, Nurgle and Slaanesh cards are collectively the Chaos spell cards.

Before the game begins players determine their wizards' spells. A wizard has between one and four spells depending on his level. These spells are dealt randomly before the game begins. A wizard's spells are retained throughout the game. He can cast each spell once during the Magic Phase, and he can continue to cast the same spell each turn assuming he is able to do so.