AllBullshit
So basically his powers are in control of that spirit? mono, if I had powers, I would hate for them to be under the control of other sentient beings, it's like you get your money, but you have to go to the bank to get it, and the highest authority (in this case, the spirit) could just to take it from you, otherwise you would also need to depend on it, asking permission to use it is no different than borrowing it.