From publisher blurb: As the director of CASTLE, Nathan Storm is addressed as the “Castellan.” He helped in the formation of “Knight” teams and the founding of the Sentinels, the most powerful heroes of the United States. With these assets, Nathan hopes to make the United States and the world at large a safer place to live in the Age of the Superhuman. Super Powered Legends. Because sometimes you a need a character everyone knows, even if they're meeting them for the first time.