Due to the destruction of Earth-Two during 1985's Crisis on Infinite Earths, Power Girl's existence on Earth-One became problematic. Therefore her character underwent major changes in the Modern Age, initially transforming her heritage from Kryptonian to Atlantean. Her retconned origin made her a direct descendant of the sorcerer Arion of Atlantis, and she had been frozen in suspended animation for a thousand years before being released in the present day. In 2005 the events of Infinite Crisis revealed this origin to be false, and Power Girl once again became one of the last Kryptonian survivors of Earth-Two. During the Modern Age she continued to operate with the retconned Justice Society of America and also joined the Justice League of America.