But it doesn't work.
What syntax were you assuming and what happened? I don't think ranges in SED can be stated in terms of offset from current position, eg, this works:
sed '1,/pattern/ <action>'
sed '/pattern/,3' <action>'
performs <action> starting with the line containing <pattern>, thru the 3rd line from the beginning
sed '/Superfiction/,/^$/d' lines
(removes everything from the line containing "Superfiction" to the first empty line.)