Star vs the Forces of Evil

Now this section of multi verse has a lot of potential, though most certainly comes with risk, and things that would stand in your way like the so called Magic High Commission. But your not focused on conquering this multiverse of dimensions just yet. No your goal is to find a good choice for a right hand to help in your goals. Which you may have very well found in

1. Star Butterfly - Such power put together with her wild nature is a perfect combination for you. After all she's powerful but still has a lot to learn, leaving her open to more dangerous entity like yourself and corrupting into the next Dark Queen of Mewn could be very fun indeed.

2. Adult Queen Moon - Now normally this proud Queen would be more likely to oppose you than help you. But recently thanks to her time in the Realm of Magic she's lost all her memories, which makes her very **** to your manipulations. So why not take advantage by rebuilding her mind into the kinda of person you want her to be. Plus in your opinion woman like this deserves so much better than that oaf River.

3. Teenage Queen Moon - Well this newly crowned Queen after the **** of her mother Queen Comet, is facing quite the crisis. Perhaps if you get to her before she goes to Eclipsa than you manipulate the still inexperience Queen and plays in a way that you gain more than a trusted 2nd.

Perhaps maybe approaching her as a equal with a offer of alliance. Where he'll help her not only protect and save Mewni, but also give her justice for her murdered mother. But in exchange this must seal this deal with not only magic but also marriage and eventually child.

# more options

(Slight note: One possible option for the younger Moon path is maybe later on down the way is the Overlord fathering Star instead of River.)