The Adventures of Peter Wheat #25

Peter Wheat journeys through a magic tunnel to Fairyland, where he encounters the Fairy Queen and learns of a wicked wizard named Dorrock who threatens the sprite inhabitants. A man who was previously turned into a toad by Dorrock's curse provides Peter with information about the wizard's location on a map. The Fairy Queen gives Peter a magical sword of keenest steel, and together with a fairy companion who joins him for the hunt, Peter confronts Dorrock. During their battle, the wizard attempts to use his dark magic and invisibility cloak against Peter, but the fairy's goblin magic proves effective against Dorrock's black magic, ultimately defeating the villain.