The initial agreement between the two of them was that Cyrus would help Voldemort before he obtained the prophecy, and Voldemort would resurrect Angus after getting it.
Voldemort was convinced that Cyrus would not allow Fudge to continue holding leverage over her. Given Cyrus's previous relationship with those in the Order of the Phoenix, Voldemort did not entirely trust her claim that she merely wanted to use them.
This time was not only for Cyrus to voluntarily declare her stance, but also a test. Facing Voldemort's undisguised gaze, Cyrus's expression remained calm, and her voice carried a touch of laziness: "Considering the cowardly behavior of certain people who only want to hide in the rear and reap the benefits, the only way to make Harry appear of his own accord without the Order of the Phoenix members discovering any clues is to have him play the role of the savior. Reckless and impulsive as he is, he will surely rush off to the Ministry of Magic at the very first moment. As for how this play should be performed..."
Chapter 95