The challenge

Daniel speeds throughout the city becoming familiar with it before he starts causing trouble then finally he hears a sonic boom in the sky he turns and looks to see Supergirl landing on the ground before looking at him.

Kara: Who are you and why are you attacking these people.

Daniel: Iam The Reverse Flash and I was getting your attention

Daniel says vibrating his voice to sound like a monster

Kara: that wasn't a very good idea what do you want with me

Daniel: a challenge The Fastest Man Alive vs The Girl Of Steel I wanna see who's best

Kara: and if I say no?

Daniel: then I'll keep destroying this city

Kara: fine you wanna fight you got it!

She yells as they charge each other