Twin sister of Terry Magnus, Teri Magnus, along with her brother developed with Ariel Masters in Cadmusworld a method to recreate the Justice League in the year 3000, with the objective to fight the Five. Unknown to Teri, her brother was the leader of the Five and killed her unexpectedly. However, Ariel used Teri’s DNA mixed with Barry Allen code to make her the new Flash of the future version. As a side effect of the mix, not only Teri has now superspeed, but also has show some traits of Barry’s behavior.
