[He lets out a laugh.] Fair enough, you do deal with gods almost daily.

You see, there was once a war in some far-away planet of the galaxy. A really... really big war, I'm sorry I don't know much more than that about it. But in this war, the planet got separated from the rest of the universe. And it also split in two.

Apokolips and New Genesis. What we call 'hellhounds' comes from the former.