Zatanna’s run in Adventure comes to a close with a mediocre tale in issue 421 (July 1972) by Steve Skeates and Win Mortimer.
She encounters an aging stage magician who has lost his faith in himself, and who is being pursued by the mob. Exactly why they are after him is never addressed, or even treated as something unusual. Mobsters are always trying to kill magicians, it seems.
Zatanna rescues him from an attack, but then sets up a situation where he can rescue her. Not that he saves her with real magic, or even a magic trick, just by pushing away a falling pillar.
Nevertheless this act restores his confidence, and Zatanna goes on her merry way, completely convinced that the old magician will be able to take out the rest of the gang when they come after him.
Can’t help feeling that her confidence in this was misplaced, and the old guy got fed to the fishes an hour or so after the story ended.
Zatanna’s back-up feature moves with Supergirl when she gets her own series in a couple of months.