History: Sierra participated in Lex Luthor's Everyman Project, which gave superpowers to normal people. She took the superhero identity Matrix, and. Luthor hand-picked her to be on his personal superteam Infinity, Inc.

(52 / WWIII Part Four: United We Stand #1) <Week 50, Day 7> Black Adam arrived in China, and prepared to destroy the entire country. He defeated China's superhero team the Great Ten before China allowed Matrix and the American superhero community to square off against him. Black Adam was a god with nothing left to lose, and each punch he threw was intended to kill. His savagery was winning the day until Martian Manhunter reappeared and flooded his brain with his own loss, the death of the entire Martian species. Black Adam was distracted long enough for Captain Marvel to hurl a Shazam bolt at him. Theo Adam was powerless, and left with amnesia. He staggered away unnoticed from the end of WWIII.

Comments: Created by Geoff Johns, Grant Morrison, Greg Rucka, Mark Waid & Keith Giffen.

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