The Amazing Spider-Man (1963) #167

With the help of electro biologist Marla Madison, J. Jonah Jameson launches his Spider-Slayer robot into battle with the wall-crawler. But with J. Jonah Jameson calling the shots, the Spider-Slayer has a less than satisfactory performance. A super-powered being named Will O' the Wisp begins terrorizing New York, while Harry Osborn receives a visit from his psychiatrist Barton Hamilton. Who is Will O' the Wisp? And what effect will his powers of hypnosis have over Spider-Man?