This Masters of the Universe t-shirt shows He-Man and Battle Cat guarding Castle Grayskull in the middle of a lightning storm. When Prince Adam held the Sword of Power and said "by the power of Grayskull, I have the power", he was transformed into the most powerful man in the universe, He-Man. As He-Man, he protected the universe by defending the secrets of Castle Grayskull from the evil Skeletor.