The Flash/Reverse Power Man Cosplay UK Halloween UK Costumes(MLYX-0073-03)

Edward Clariss aka the Rival first appeared in Flash Comics #104 (February 1949). Dr. Edward Clariss, a professor at the university attended by the Golden Age Flash, Jay Garrick, has recreated the formula that gave Garrick his speed, which he calls "Velocity 9". He had heard Joan one night talking about how the Flash gave his speed to another student, which helped him get the last formula. Bitter at the scientific community's rejection of his claims, Clariss becomes a criminal. He wore a darker version of Flash's and gave it to several other criminals. The Rival's version of the formula proves to be temporary, and he is defeated and jailed.
In JSA #16 (November 2000), a flashback shows a battle between the Rival and the Flash that took place several months after Clariss' first appearance. Through unexplained methods, Clariss has regained the power of super speed. During the fight, Clariss reaches light speed and vanishes into the Speed Force. Following the reformation of the Justice Society of America 50 years later, Johnny Sorrow retrieves Clariss from the Speed Force and invites him to join the new Injustice Society. The Rival, driven insane by his time in the Speed Force, races across the country on a super-speed killing spree. The Flash realizes that the Rival's path across the country spells out Clariss' name, and that the final murder will be Jay's wife Joan. The Flash absorbs the Rival's speed before he can kill Joan.
The Rival returns in Impulse #88 (September 2002), posing as Joan Garrick's doctor. Now pure speed energy, he possesses Garrick's fellow Golden Age speedster Max Mercury. After battling Jay and Impulse, the Rival escapes via time travel to an unknown destination, still in possession of Mercury's body.