The class has a fairly narrow divine spell selection. The spirit shaman cast spells as sorcerers do, but they change their spell selection each day by sending their Spirit Guide into the spirit world. The shaman also has a special abilities that affect spirits (incorporeal undead, fey, elementals and creatures defined as spirits in other texts). The Spirit Guide is a purely mental/spiritual creature, incapable of affecting the world, though it does grant the spirit shaman the feat, "Alertness", as well as justifying certain class features. Ultimately, at 20th level, the spirit shaman becomes a spirit (fey) himself, much as a 20th level monk becomes an outsider.