The Legion of Doom (LOD) was a hacker group active from the 1980s to the late 1990s and early 2000. During its heyday from around 1984-1991 Legion of Doom was widely considered to be the most capable hacking group in the world. To this day, LOD ranks as one of the greatest, and certainly most influential hacking groups in the history of technology. Their name appears to be a reference to the antagonists of Challenge of the Super Friends. LOD was founded by the hacker Lex Luthor, after a rift with his previous group the Knights of Shadow.