Complex sentence: They then threaten to torture Starfire if Ghost will not betray the location of the other villages, so just as Starfire's hands are about to be chopped off, Ghost finally agrees to tell them what they want to know.
Split into simpler sentences: They then threaten to torture Starfire if Ghost will not betray the location of the other villages. Just as Starfire's hands are about to be chopped off, Ghost finally agrees to tell them what they want to know.