During the magic phase of his own turn a wizard may cast each of his spells once. In order to cast a spell the player must expend magical power. The amount of power available to the player will therefore determine how many spells can be cast that turn.

A wizard's power comes from the swirling magical energies that blow over the Warhammer World. Because of the way these energies ebb and flow they are referred to as the winds of magic. This energy is represented by cards dealt to the players from the Winds of Magic deck at the start of the magic phase.

As we shall see, some spells are easier to cast than others, some require 2 or 3 points of power whilst others require only 1. The more potent a spell is the more power is required to cast it.