The Spontaneous Druid
It's odd that the mystic druid must prepare spells ahead of time--so now he doesn't! The shaman is a nature and spirit-focussed spontaneous caster, with great new abilities and an animal spirit guide.
Welcome to the Expanded Shaman, a base class for the Pathfinder RPG that was first presented in Kobold Quarterly #21.
The removal of prepared spells makes this a more mystical and freeform nature-based caster, and the new powers and expanded wildshape and totem abilities mean that the Shaman is both flexible and powerful. Marvel at the new spirit dance, improved wildshape powers, and totem secrets, which grant additional powers beyond the ken of mere druids.
The Expanded Shaman includes much new material beyond the original magazine version, such as three new archetypes for the elemental shaman, primal shifter, and witch doctor, plus new feats and spells specific to the Shaman that make them masters of the spirit world and an expanded list of animal spirit guides. The Expanded Shaman includes a full 20-level character progression plus tracking sheets for animal spirit companion and wildshape forms.