| During their last encounter instructed Hourman to take the to 2016 and stop the Legends original arrival in 1942 | Rex is killed by the Reverse-Flash |
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| After a successful mission, Rex returned to the JSA headquarters with the but was attacked by the , who phased his vibrating hand through Rex's chest to prevent him from completing his warning to the Legends | Conferring with Martin Stein, he launched an attack on a transport containing an amulet that was meant to be traded for a serum that would allow the creation of Nazi super soldiers |
| Rex eventually rose to become the group's leader | |
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| Rex and Sara Lance aboard the Waverider | Wanting to hear their side of the story Rex was further confused when Professor , as Rex presumed to be the team leader, addressed him as though personally acquainted |
He was then contacted by the president for a mission in Paris after Baron Kreiger was located.
28| The speedster then fled, and the fatally injured Rex was discovered by Amaya | Despite the JSA's discouragement against fraternizing within its ranks, Rex and Amaya fell in love and decided that once the war was over, they would leave the JSA so they could be together |
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| During their last encounter instructed Hourman to take the to 2016 and stop the Legends original arrival in 1942 | Despite the JSA's discouragement against fraternizing within its ranks, Rex and Amaya fell in love and decided that once the war was over, they would leave the JSA so they could be together |
Upon returning to the ship wished to return to save Amaya and Ray, but Rex remained adamant that they destroy the Nazi's super serum with an air strike.
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