Hecate noted Luna's presence by her side but she did not look at her; her eyes were on Ares. She stepped forward, bringing herself close to the war god. She came from a much older time, and many mortals still invoked her name, but Ares had a power to him too, and it was not nothing. She had no tools of ritual, nothing to help solidify her magic into being apart from the power she held in her own self - it was strong, though. It would be enough.
"This child Luna is under my protection," she told him, her voice clear between them though the mortal music still pounded the air. "You will respect that. You will never lay hands on her again. You will never order any harm upon her. Three rules, Ares, and for three days as proof of the gravity of this protection, I curse you. Your sex organs will be useless, your dick as limp as a dead thing between your legs, no feeling, no reactions, nothing." She drew all her power into herself with one long, solid breath. "And if you break the protection I cast over Luna, this curse will last as long as my name is spoken by those who believe in me, and I will grant you no cure, not ever."