User blog comment:SuperBen 1000000/Damien Dhark vs Zoom/@comment-28419685-20160509165003/@comment-3423279-20160510004844

Zoom could find out Dhark has a family, if Oliver Queen couold find out then I am fairly certain a guy like Zoom can.

Plus I doubt that Dhark is an immortal like Vandal is, Dhark seems to be more along the "You don't age" variety than the "You can't die" type.