Quileute Wolf

Before you start:
  Be specific with your fur color, for example, "black" or "brown" isn't good enough. Instead, be specific such as "dark, rusty brown" or "smoky charcoal black." Your best bet is to add two adjectives.

Preparing:
Be outside during the day. Say the spell and lightly bury the meat.

Spell:

"Wolf spirits, I ask that you turn me into a werewolf. I wish that I could become a large, strong wolf whenever I want, with (color) fur. Please make this me, so mote it be."

 First Shift:
It is very unlikely that you will shift until you are 16, but when you're ready for your first shift, go to the place you buried the meat and say in your mind, "Wolf spirits, I am ready to transform." Depending on your age, you may or may not shift.

Your first shift will be somewhat slow, and really painful. But, as you shift more and more, you'll get used to it, and it won't hurt as much, and eventually you'll barely feel a thing. And it will get faster, until it only lasts about one second!

But as you shift more and more, you can call on the wolf spirits in your head further away from the place, and eventually anywhere.