Mysto the Great
From superman.nu: Supermanica
Mysto the Great
An alias employed by Superman in February 1957 when he poses as a stage magician capable of producing Superman from an empty cabinet and forcing him to perform super-stunts as part of an elaborate and ultimately successful scheme to apprehend the mystery boss of the Metropolis underworld (S No. 111/3: "The Magical Superman"). (TGSB)
