#OnThisDay in 1963 #ElementLad debuted in @dc.com #AdventureComics #307 as #MysteryLad confiding his #uniqueSuperPower only to #SaturnGirl & accepted into #LegionOfSuperHeroes #withHerBacking #helpsTheTeam against #spacePirate #Roxxas reveals he’s #lastSurvivorOfHisPeople w #powerToTransmuteElements