[quote=@GhostReaper]
Kind of like binding them to himself, and forcing them to bend to his will. So would it be like an Incantation, where he needs to prepare it, or at least have time to focus. Or something where he would have to brand it, and then he can banish it and summon it at well and also it is bent to his will?  
[/quote]

Yes, you would bind them to yourself then you would have dominion over them. You could then summon them at will later.

For binding, I'd probably go along the lines of either physically restraining or incapacitating the demon and placing it within a binding circle for a certain amount of time. Alternatively, if you physically inscribed it into the demon I'd also allow something like that. However, given the vast amount of power this has, I would encourage going with something with significant amounts of preparation.