As you make your last changes to the girls you give yourself a harem complete with Eunuch guards.
The well hung men of the office have now become eunuchs. Each one showing differing signs of the eunuch process. Some having grown breasts. Rounding hips becoming more feminine. Some becoming rather chubby not having the testosterone to give them the incentive to work out. There were even a few that became quite twinkish losing all muscle tone and becoming almost pets to the women that are your harem.
You draw several dozen women to you as your harem spell advances.
You sport a turban as the moguls of old once wore.
As you change you realize that you can promote others to generals with their own harems. Not to outnumber your harem.
The last change that happens to you is that you begin to inflate. Inflate isn't quite the right term but the baggy clothes that you now wear are filling up and you realize that you are becoming a quite rotund man. Lounging on your sedan as your eunuch slaves serve you and your harem attends to your needs.
Realizing you are becoming quite large you try to use a little of that magic and stop or even reverse the last spell but this massive world wide change has exhausted all your powers and you will never be able to use magic. You are stuck this way.
Almost immobile with your size you please your harem nightly and rule your domain in the day.
Your seed produces hundreds of offspring and even at your size your health is wonderful. One of the perks of the magic that once inhabited your body.