#OnThisDay in 1963 #Proty debuted in #AdventureComics #308 #TheLegendaryProteanBeastFromAntares #ChameleonBoy #takesOnAsAPet #afterRescueFromCrooks stealing #TheRarestAnimalsInTheUniverse #1stTransformsIntoAGun while #TheLegionOfSuperHeroes pose as #spacePirates later #givesHisLife for #LightningLad