Shamnistic, or Spirit, magic comes in as many flavors as Arcane Magic. In many ways the two are almost indistinguishable from one another.
Arcane magic uses the raw, inherent magic of the world itself. Where arcane magic has no easily identifiable source, Shamanistic magic uses the direct magic of natural events and objects such as plants, rocks, waterfalls, and storms. Where arcane mages sense magic in the raw which Shamen cannot, Shamen sense it within objects and living things where arcanists cannot.
Shamanism does not use the properties of items in conjunction to create an affect in the manner of alchemy, but the spiritual essences of those items to achieve a goal. Typical components are plants or minerals used in manners very similar to arcane foci. Rather than being foci, however, it is the inherent property of the plant or mineral that offers an effect; offering a magical expression of itself rather than binding outside (arcane) magic to a purpose defined by the item.
Shamanism also makes heavy use of spiritual essences. Nymphs, Dryads, and other ephemeral entities are petitioned to act on behalf of the Shaman or witch doctor. Arcane mages can interact with spirits on this level but in different ways and usually by force where a Shaman can do little more than ask.
Lutins rely almost entirely on shamanistic magic as do most who live in close concordance with nature. Elves use both, often causing schisms between the two differing practices. Few employ both due to their often conflicting disciplines.
Murikeer is one such who uses both approaches, though he is by definition an arcane sorcerer. He received shamanistic training from the Lutin Keletikt, enabling him to interact with spirits in the manner of Shamen. This training has given him a rare talent; he can see the life energies that Shamen use, as well as the raw arcane, and the point where one becomes the other. This enables him to manipulate the skein of magic, often before it has been coalesced into a usable spell.