An unending fighting spirit spread amongst Jemma and the others. Now that they had a clear understanding of the Dark Arts before them, they also had a counter-strategy. This was akin to a physician from the Wizard Alliance finding the root cause of a patient's illness, no longer dwelling in uncertainty. Once the source was discovered, it was as if the antidote had been found; even an intricate problem could be swiftly solved.
While the contagious disease was a distasteful and Forbidden Dark Art, it was not without a solution. As Simon had previously mentioned, if a Spirit Attack proved ineffective, the most primitive Physique Technique could be used as a fallback. There was always a way to topple a Dark Wizard.
Moreover, they had already identified why their Spirit Attacks were not working.
