If Lucrezia destroys or puts out of reach the spring and flame, however, she won't have access to them either.
And she actually is (whew) gone from Agatha. So if this clank body gets destroyed, where is she still existent? I'm losing track. -- plus which, it's the clank body that looks like the one in the time window, very early on. Though I suppose that if she exists elsewhere she could probably build another one.