Astral magic includes the standard three types of spells found in the Hermetic art; formulaic, spontaneous and ritual. Casting formulaic spells is done in the same manner as hermetic magi: Ability in a force (technique) plus ability in sign (form) plus a die roll, modified according to rules, etc. However, astral magic does not readily lend itself to producing spontaneous effects. This fact, and a strong Mercurial tradition, predispose the magic of the sahir to formulaic and ritual spells. The total roll for spontaneous Astral spells is always divided by 5 to determine the effective level, and fatigue is always lost.