#OnThisDay in 1976 #Tyroc debuted in #Superboy #comics #216 #30thCentury #BlackTeenWithSuperSonicVocalPowers meets #TheLegionOfSuperHeroes while #attemptingRecovery of #fallenSatellite landing on #Wakanda-like #Mediterranean #islandCityOfMarzel that he protects & #heSavesTheDay & #joinsTheTeam