Zoom (Arrowverse)

"Zoom" is a man who promised to take "Atom-Smasher" home if the latter killed The Flash.

Biography
Zoom told "Atom Smasher" about the Flash, telling them that he was an unworthy hero. Zoom sent him to kill The Flash and promised to take him home if he did so. Zoom later had an encounter with Barry which caused him to miss the funeral of a personal close friend to himself and Oliver Queen.