Cleansing punishment.

Punishment, you know, is more than about making someone suffer. It is a chance at release from guilt, and a chance at a release from grudges. Satan Girl's actions led to the end of Supergirl and Power Girl, but it had all been for the best. Yet that grudge at her actions still simmered. Meanwhile already begged for your firm hand and to have her womb filled, but she had yet to present any atonement towards her victims. You need to not only break her, but to let the two Karas see you do it. You need to demonstrate how your authority brings fairness, makes all right again, that you are strong enough to be worthy of their devotion.

The first step had been getting custody of Satan Girl. You had an easy time proving she was powerless, and lacking any legal identity could be neither imprisoned nor released. As she was dependant on your aura for survival, having her placed in your care had been a simple conclusion for the League to come to.

From there you had dressed her. Her original Satan Girl outfit, the tight, skimpy black version of Supergirl's own costume, had long since vanished. Like its wearer it had been a magical construct, one she was now too weak to afford the energy for. You had a replica made and ordered her to wear it, and she obeyed eagerly.

You already knew where her punishment should take place. The cave where she had taken Power Girl. It was where Power Girl and Supergirl had broken and come to an end, it was only fitting that it be the place of Satan Girl's destruction.

You brought Kara Kent and Kara Zor-L to the site, each in their own uniforms. They had been understandably ****, afraid, but they trusted you. Schoolgirl and maid each wrapped themselves around you as you carried them through the air then down into the dark, before placing them high on a raised rock as the audience and jury for what was to follow.

Down low, Satan Girl trembled, preparing to face her fate as you doled out her punishment, and what was to be her role in your new family.