This is a vintage Adventure Comics #305 from 1963, featuring the first appearance of the character Sun-Eater and the introduction of Mon-El joining the Legion of Superheroes!! This LOSH KEY issue comic is part of the DC Universe and has been professionally graded by CGC with a grade of 7.0 Fine/Very Fine… VERY RARE at this prestigious grade!! The cover art was done by George Klein and Curt Swan, and it is a first printing collector’s edition, making it a valuable addition to any comic book collection.