Four Star Spectacular 1976 #1 - 7.5 - $25.00Two Xelthunians secretly replace Ma and Pa Kent to perform a secret mission, not knowing that the Kents are Superboy's foster parents. After Ma Kent unwisely mentions Superboy's vulnerability to kryptonite, the Xelthunians power the transporter ray they plan to use to send Superboy to their planet with red kryptonite and it turns him into a fat Boy of Steel, a bullet sized Boy of Steel, and a giant Boy of Steel. Once Superboy discovers their secret