What you need:
Full Moon 
3 Black Candles 
3 White Candles 
Lighter 
Outside

Go outside with the candles and the lighter put 3 on your left and 3 on your right light them and under the moon say this 10 times:

Goddess Hecate here my plea I wish to be a wolf, a protector I may help anyone who is in trouble I will protect my friends, family, and whoever I want I can control myself in my wolf form this is my wish so mote it be!!!