In SpellBook, each player, accompanied by a familiar, possesses a grimoire and collects Materia to master spells and feed their familiar. The game provides pre-drawn spell sets for use in the early rounds, but soon players start drawing spells randomly or create their own spell combinations that are common to all players. Each spell combination gives an effect that lasts the rest of the game, and the more ingenious the combination, the more powerful the effect. As the rounds progress, the game becomes a different experience every time, with more than 2,100 spell combinations being possible. The game ends as soon as a magician's grimoire is complete or a familiar is fully fed, then the player with the most points wins.