Meet Rex Mason, AKA Metamorpho: The Element Man! Transformed by an unlikely accident, Metamorpho now has the incredible ability to transmute his body into any natural compound at will, be it solid, liquid, or gas! Read his thrilling origin story and experience his first ever solo series, collected as part of DC Finest for the first time! DC Finest continues, a major publishing initiative presenting comprehensive collections of the most in-demand and celebrated periods in DC Comics history, spanning genres, characters, and eras! Follow Metamorpho s earliest days, from the origin story of Rex Mason to his solo adventures in his first ever ongoing series, the perfect place to get in on the ground floor of this Silver Age hero! This volume collects Justice League of America #42; The Brave and the Bold #57-58, #66, #68, #88, #101; Metamorpho #1-17.