Complex sentence: Night Nurse relents only if she can go with him since there would be no one to tend to his wounds should they reopen The Sorcerer relents but only if she tells him her real name.
Split into simpler sentences: Night Nurse relents only if she can go with him. Strange protests, but she counters by telling him that there would be no one to tend to his wounds should they reopen The Sorcerer relents but only if she tells him her real name.