The Eternity Glass is a legendary hourglass with the power to bend space and time. It also served as the power source of the Time Trapper. At some point, he was imprisoned and bound to the Eternity Glass. Karate Kid and Dawnstar used the Eternity Glass to return to the 31st Century but discovered the timeline was not fully restored (as it shows a "commemorated" statue of Lex Luthor at the museum). They used the hourglass to return to the past.