Terry Sloane (Earth-2: Post-Crisis)

"There are other JSA members whose bloodlines died that night... Heroes like me who had no families to pass their legacies on to, Mister Terrific, Doctor Fate, The Spectre, Flash... And others who shouldn't be forgotten."

- Sylvester Pemberton

Michael Holt was the Golden Age superhero known as Mister Terrific and a member of the Justice Society of America.

Golden Age of Heroes
During the Golden Age of Heroes, Holt was among those who decided to utilize their special abilities in hopes of protecting the world. Holt dubbed himself Mister Terrific, and subsequently became a member of the Justice Society of America.

Battle of Los Angeles
On Christmas Eve 2010, Holt and the rest of the Justice Society fought the Injustice Society of America. In the battle, Holt was killed in action and as he did not have any children, his family bloodline and the legacy of Mister Terrific concluded.