[quote=Nytefall]
so the rituals allow him to turn into the animals or remember/learn the animals essence so that he can turn into them? the rituals grant him no addidtional powers?
[/quote]

OK, here's a simple overview of how he works, just in general, and all of the skin-walker rituals I can think of. Maybe I'll even add them to his sheet.
Ritual 1. Turns a normal human into a skin-walker. A blood ritual that turns a human into a skin-walker. For obvious reasons, he'll never really need to use this one. He's already a skin-walker.
Ritual 2. Ritual of Essence: By wearing a pelt and meditating, he learns the essence of an animal, and can from then on transform into it at will, without needing its pelt any longer.
Ritual 3. Ritual of Fear: Using his own blood, he performs a ritual that places a charm upon a shard of human bone. He can use this bone as a dart, and it will inflict a sense of fear upon the victim.
Ritual 4. Ritual of Decay: A ritual where he creates "corpse dust," using bones, blood, and various other parts of a dead body, which he can use to poison someone to varying, but rarely fatal, degrees, depending on how he carries out the ritual.

That's it. Nothing else that I have planned. He can't buff himself or anything crazy like that. He can just make charmed tools/magic poison with his rituals, but he can't just use a ritual to directly curse anyone or make himself stronger. They're less "crazy voodoo" and more simple preparation rituals. Well, as simple as a ritual involving dead bodies can get.