Complex sentence: This does not assist her in regaining the right to become the Cheetah, however, and at a later time Minerva hunts down and kills Sebastian in his human form, regaining her Cheetah form as a result.
Split into simpler sentences: This does not assist her in regaining the right to become the Cheetah. Ultimately (off-panel) Minerva finally kills Sebastian in his human form, regaining her Cheetah form as a result.