Clariss manages to find Alchemy in his super creepy hideout and asks him to make his visions go away, but he’s told that he can instead make the visions come true.
And, well, because Clariss is all nutty from the visions and not getting any sleep, he says yes, and Alchemy somehow gives him back his speed and gifts him with his Flashpoint Rival costume and handy dandy voice disguiser.
While he was trying to deal with the repercussions of messing with the timeline, Edward Clariss, better known as Flashpoint’s Rival from the premiere episode, was being mentally tormented by Alchemy and visions of the other life as a speedster he had during that other timeline.