#OnThisDay in 1962 #AdventureComics #305 after masquerading as #prospectiveApplicant #MarvelLad & it’s revealed #Brainiac5 #curedHisVulnerabilityToLead & #MonEl left #ThePhantomZone to join #TheLegionOfSuperHeroes when they #soughToAddtNewMembers after #TheDeathOfLightningLad