In 1994 the character was adapted once again into a feature film, The Shadow, starring Alec Baldwin as Lamont Cranston and Penelope Ann Miller as Margo Lane. As the film opens, Cranston has become the evil and corrupt Yin-Ko (literally "Dark Eagle"), a brutal warlord and opium smuggler in early 1930s Mongolia. Yin-Ko is kidnapped by agents of the mysterious Tulku, who begins to reform the warlord using the psychic power of his evolved mind to restore Cranston's humanity. The Tulku also teaches him the ability to "cloud men's minds" using psychic power in order to fight evil in the world. Cranston eventually returns to his native New York City and takes up the guise of the mysterious crime fighter "The Shadow", in payment to humanity for his past evil misdeeds: "Who knows what evil lurks in the hearts of men? The Shadow knows..."  His nemesis in the film is adapted from the pulp series' long-running Asian villain (and for the film, a fellow telepath), the evil Shiwan Khan (John Lone), a descendant of Genghis Khan. He seeks to finish his ancestor's legacy of conquering the world by first destroying New York City, using a newly developed atomic bomb, in a show of his power. Khan nearly succeeds in this, but he is thwarted by The Shadow in a final psychic duel of death: Cranston, as The Shadow, imposes his will on, and defeats, Khan during a psychokinetically enhanced battle in a mirrored room, which has exploded into thousands of flying mirror shards. Focusing his mind's psychokinetic power, The Shadow flips a flying piece of jagged mirror in mid-air and then hurls it directly at a spot on Khan's forehead; this does not kill him, it renders him unconscious. To save both the warlord and the world, The Shadow secretly arranges with one of his agents, an administrative doctor at an unidentified New York asylum for the criminally insane, to have Khan locked away permanently in a padded cell; Khan's badly-injured frontal lobe, which controlled his psychic powers, having been surgically removed.  The film combines elements from The Shadow pulp novels and comic books with the aforementioned ability to cloud minds described only on the radio show. In the film Alec Baldwin, as The Shadow, wears a red-lined black cloak and a long red scarf that covers his mouth and chin; he also wears a black, double-breasted trench coat and a wide-brimmed, black slouch hat; as in the pulp novels, he is armed with a pair of Browning .45-caliber semi-automatic pistols that for the film have longer barrels, are nickel-plated, and have ivory handles. The film also displays a first: Cranston's ability to conjure a false face whenever he is in his guise as The Shadow, in keeping with his physical portrayal in the pulps and the comics.  The film was financially and critically unsuccessful.

Answer this question "What was the shadow" by extracting the answer from the text above.
The Shadow pulp novels and comic books with the aforementioned ability to cloud minds described only on the radio show.