William kept training like crazy during the past five years. The black fox spirit he met before wasn't lying, the technique he learnt from it was indeed great and marvellous.
It didn't just change the colour of his spirit body into black instead of silver, but it also gave him more control over his spirit form. Right now, William didn't need to change all the way to the scary form of his fox spirit and could easily control his spirit form and develop any number of tails he wanted.
After five years, and through lots of adventures, he added two more tails to his spirit. Not to mention gaining five more spirit elements. He now had ten spirit elements, with four special ones and six normal elements.
