Zatanna gets chloroformed by Zelda the Trapeze Artist. When Zatanna wakes up, she is bound and gagged to a big target board. Zelda picks up a knife and throws it at Zatanna. Zatanna manages to break free just in time to make the knife disappear. She then uses her magic to bind and gag Zelda.
Great original comic, and...
Whoo! Finally found a larger scan of the book cover.
More info: This is from the UK edition. It's volume 26. Publisher is Armada Books, UK, 1978.
ISBN: 0006913873
ISBN-13: 9780006913870
A very famous cover showing Spider-Woman bound and gagged to a chair. The cover reads "The Spider-Woman is Helpless...before the mindless rampage of the Werewolf by Night".
The scene begins in issue #5.