Sihn gave them an opening, and Parsley didn't intend on letting it go to waste.
During her training with Caliban in Universe 16*, Parsley learned a great deal about sorcery. Namely, how to use her Blood Magic more effectively and how to meld it with her Ki. It may have been no big deal for some, but to her, it made her just that more potent. As she began shaping her blood into a rune, she summoned the ki nullifying mist that her wife specialized in.
Perfect Intuition: Ki Negation
Instead of immediately setting that loose on the Meister, she instead enfolded it around her rune and perfectly melded them together into a seamless mixture of ki and magic. The rune took shape, then flashed golden just as she thrust her hand outward toward the Meister. It disappeared, then reappeared under him. It flashed again, then erupted upward and formed a massive ethereally green tornado.
[Ki Negation] + [Blood Rune] = Soul Siphon
Her intention for the spell was simple. The properties of
Ki Negation was to rapidly drain a person's ki supply until they were nearly empty. Enhanced and transformed by her blood magic, her spell would instead drain the blue flame from the Meister and funnel it into Parsley's waiting hands. What she would do with that energy depended greatly on how much she managed to siphon form him. There was more than she could comprehend inside that creature, so she would probably have more than enough to work with for what she had planned next.
*To be revealed whenever the magic training camp arc begins