Shrunken and Controlled

A slave has no purpose when they are so large. That is exactly why I'm going to put you in a strong trance, and make your body shrink smaller and smaller. You won't be able to stop the transformation no matter how hard you try. My powerful shrinking technique will take over your whole existence, until you're nothing but a helpless, powerful slave. As you shrink to the level of every part of my body, you'll be in ecstasy as my form rises to tower above you. This was done as a custom.