Dervish posesses the power of super speed.
Stephanie and Cassandra tried to save Harley Quinn from a team of Jokerized (infected with venom from The Joker, driving them insane) villains in Joker: Last Laugh (3). They included Carnivora, Dervish, Killer Frost and Phobia. Dervish was primarily responsible for beating Batgirl, and the pair were captured along with Harley. Fortunately, they got rescued by Power Girl.